một người cần 12 lit khí oxi (đo ở điều kiện 20 độ C va 1 atm, biết rằng ở điều kiện này 1 mol khí bất kì chiếm thể tích là 24 lít) thì theo em dùng nguyên liệu nào có lợi nhất trong 2 nguyên liệu sau: KClO3 và KNO3 (biết giá 1kg 2 phân bón này xấp xỉ ngang nhau khoảng 60k, nguồn: shoppe). em hãy tư vấn và giải thích cho họ
1/
Sue: What..36.....(you/do) tonight, Kevin?
Kevin: I....37.........(go) to that dinosaur exhibition at the museum. Do you want to come?
Sue: No, thanks. I..........38........ (already/see) it.
Kevin: Oh? What did you think of it?
Sue: I .... 39...........(enjoy) it more if my little brother hadn't been with me
Kevin: Why?
Sue: Well, the exhibition was interesting, but my brother spoiled it for me. While I ........ 40 .......(look) at the Tyrannosaurus Res, he disappeared.
Kevin: Oh, no!
Sue: Yes, I couldn't find him anywhere. I ...41.......(look) for him for about half an hour when a museum guard approached me and told me had found a little boy.
Kevin: Where was he?
Sue: When they found him he ...42..... (sit) on the back of a dinosaur
Kevin: Ha ha! I'm sure you.......43.........(be) happy when the school holidays are over.
Sue: That's true. I ......44............(have ) more than enough of him by the end of him by the end of the summer. School.............45.....(start) on September 3rd. I'm really looking forward to it
11. ................... pretty you look today!
a. what b. how c. what a d. such
12. ................. trying hard, I couldn't lift th box .
a.despite the fact b. in spite of c. although d. whereas
13. Spain, .................. is a Mediterranean country, is visited by many tourists every year.
a. what b. where c. which d. whose
14. she claimed.............. a ghost while staying at the old castle .
a. to see b. to be seen c. seeing d. to have seen
15.we left the house early .................. we would be sure to get to the threatre on time
a. in case b. so that c. for d. just as
16. the barman asked the customers .......................... Porsche was parked outside.
a. what b. who c. which d.whose
17. the man ................ invented the telephone was called Bell
a. which b. who c. what d. whose
18. the place.................... she was born has changed a lot recently.
a. where b. when c.which d. what
19. ................ strong coffee this is!
a.how b. what a c. which d. what
20. I'm sorry ................. that I didn't enjoy your book
a. say b. to say c. saying d. be saying
A. Choose the correct item.
1. I'm sorry ............................. you that the flight is booked up
a. tell b. telling c.to tell d.for telling
2.he regrets .............. so much money on the clothes
a. to spend b.he will spend c.spent d. having spent
3.I don't know when he........ back - do you want to wait?
a.will come b.has come c.comes d.came
4. you ..... be late again or your parents will be informed.
a. don't have to b. aren't c. needn't d. mustn't
5. John......... phoned us; we already knew about the meeting.
a.needn't have b. mustn't have c. didn't need d. may have
6. we'll ring them before we go in case they............busy.
a. are b. were c.have been d. had been
7. they put the papers in a safe place........ lose them
a. in case b. so that not c. so as not to d. not to
8. the journey was............... long that we were exhauster by the end.
a. such b. very c. enough d. so
9.there's .............. lot of work! Do you think you could help me???
a. such b.so c. such a d. so a
10.she suggested ............ to the zoo.
a. to go b. will go c. would go d. going
11.it was............ interesting book that I couldn't stop reading it
a. so b.such c.such an
12.I wish I ......... to buy a new dress for the party
a. can afford b.could afford c. would afford
13. ............... the bad weather, we had a wouderful holiday
a. despite b.although c.whereas
14. ................. an amazing view!
a. how b.so c. what
15. if you ............................. your dinner, you can watch TV
a. had finished b.have finished c.would finish
16. ..................... you're tired, I'll make the dinner.
a. since b.because c.for
17. if I .......................... you, I would see a doctor.
a. am b. will be c.were
18. the bag was ................... heavy that I couldn't carry it
a. such b. so c.such a
19. ...................... you wear warm clothes, you will catch a cold.
a. unless b.if c. providing
20. this is the car............ I repaired the week
a. who b. which c. where
1. if I had locked up my bike, it ..................have been stolen.
a. couldn't b. wouldn't c.would
2. if you ...................hungry, have a sandwich
a. be b. were c. are
3. mum will be angry if she ........................... you doing that.
a.sees b.saw c.had seen
4. I'll phone you ................. I get to the station
a. if b.when c.until
5. I had fallen asleep...................... he got home
a. by the time b.when c.until
6. I................... you if I had known your number
a. would call b.will call c.would have called
7. I put on the heating....... the house would be warm
a. in order b.so that c.in case
8.I wish I ............... more for the exam
a. have studied b.had studied c. wil study
9. I' ll take my umbrella................ it rains
a.so that b.in order to c.in case
10. I wish he ...................... so rude to people
a.wouldn't be b.won't be c.would be
21."cary................ your work until I get back,'' said the teacher.
a.out b.up c.on with
22.he couldn't decide..............what to wear to the party.
a. on b.with c.for
23. Mrs Jones couldn't deal................all the party.
a.of b.with c.on
24. small children depend............... their parents for survival
a. with b.to c.on
25. could you hold.............., please. I'm busy at the moment .
a.up b.back c.on
26.the teacher explaned the question................ the students.
a. of b.to c.at
27. I am fed ............... talking the bus to work.
a.up with b. for c. on with
28. we got ................... the train and found our seats.
a.on b.through c.on with
1.she............... work by six o'clock
a.will finish b.will have finished c.is going to finish
2.now that I've got a job, I................ a car.
a.will buy b.am buying c.am going to buy
3.the train..............Manchester at nine o'clock
a.leaves b.is leaving c.will leave
4.look out! You ...............!
a.are falling b.are going to fall c.will fall
5.I promise I............... home in time for the party.
a.will be b.will have been c.am going to be
6.by the end of the day, she .......... for ten hours.
a. will be working b.will have worked c. will have been working
7. he .................the doctor this afternoon
a.is seeing b.sees c.will have been
8. I.................James tonight, so I'll tell him the news.
a. will see b. will be seeing c. will have been seeing
9.this time next week, we.............. on the beach.
a. will lie b. will have been lying c.will be lying
10.I think I ............. some sandwiches. Do you want some?
a. am making b. will make c. am going to make
11. remember.............. some milk. We're run out.
a. buying b. buy c. to buy
12. this dress is ................. for me to wear.
a. too short b. short enough c. short too
13.Amy is a very ........ person.
a.interest b.interesting c.interested
14.Paul lelf without................ goodbye this morning.
a.say b.to say c.saying
15. we go .................. once a week to keep fit.
a.swim b.swimming c. to swim
16. I heard Mr Brown ........... on the phone.
a.talk b.talking c.to talk
17. the coffee wasn't ........... for me to drink.
a. cool enough b. enough cool c. cool too
18. she was very .................. by the story he told
a. amuse b.amusing c.amused
19. Martin suggested.................. to the cinema
a.go b.going c.to go
20. the horror film we watched was...............
a.terrify b.terrifying c.terrified