B1Tìm x,y biết:
\(\dfrac{x}{2}=\dfrac{y}{7}\) và 2x-5y=93
B2Cho 4 số a1, a2, a3. a4 khác 0 và thỏa mãn :
\(a\dfrac{2}{2}=a1\cdot a3\) và \(a\dfrac{2}{3}=a2\cdot a4\)
Chứng minh rằng:\(\dfrac{a\dfrac{3}{1}+a\dfrac{3}{2}+a\dfrac{3}{3}}{a\dfrac{3}{2}+a\dfrac{3}{3}+a\dfrac{3}{4}}=\dfrac{a1}{a4}\)
Bài1
a,\(\dfrac{x+1}{111}=\dfrac{y+2}{222}=\dfrac{z+3}{333}\) và 5x+2y+z=1100
b,\(\dfrac{x}{2}=\dfrac{y}{3}\) và \(x^2.y^2\)= 52
c,\(\dfrac{x}{5}=\dfrac{y}{3}\) và\(x^2-y^2=16\)
d,\(\dfrac{x}{2}=\dfrac{y}{3}\) và x.y=54
e, \(\dfrac{x}{4}=\dfrac{y}{3}\) và x.y=12
Ex1
1. My friend wanted me (buy).......him some books
2. She often uses the Internet for (chat).......
3. They decided(buy).......another computer
4. When he was free, he love (lie).....on the grass under a tree ( read)....books
5.Did she ask you (write)..... your name on the box?
6. The boy hated (have)....... rice for breakfast.
7. They young man was very good at ( repair)....things around the house
8. Whould you like (come)......and (visit)...... me next summer?
9. The girls went (see)......some famous places in Ha Noi
10. Do children like (play)......in the swimming pool?
11. I'd would really like (go)....... some where for a drink
12. Would you rather (have)....some thing to eat?
Ex2: rewrite the following sentences:
1 Lan spends two hours doing her homework every day.
=> It take....................................................................
2 Why don't we clean the room?
=> Shall we.............................................................
3 My father prefers playing soccer than watching it on TV.
=> My father would
4. Nam is fond of swimming
=>Nam love
5 I want two kilos of rice
=> I'd
6 Would you like to sit down?
=> Do
7 Let's clean the beach this sunday?
=> Shall
8 It took me two hours to drive to Ha Noi yesterday.
=> I spent
9 Would you mind closing the door, please?
=>
10 He spends an hour playing sports a day
=> It takes
11 I prefer watching TV
=> I'd
12 Could you clean the room, please?
=> Would you mind
Ex1: put the verbs in brackets into the corest form: ( gerund or infinitive)
1. I arranged.........(meet) them here.
2. He urged us.........(work) faster
3. My mother tould me.....(not/speak) to anyone about it
4. He tried...........( explain) but she refused.......(listen)
5. Whould you mind.....(show) me how to do this work
6. I couldn't help.....(overhear) what you said
7. He surprised us by........(go) away without......(say) goodbye
8. Please go on.....( write).I don't mind............(wait)
9. The doctor advised him......(give up)..........(smoke)
10. My watch keeps....(stop)
11. I advised you.....(start) looking for a new house soon
12. Whould you mind....(lend) me some money?
13.After......(hear) the condition, I decided......( not/ enter) the competition
14Would you like.....(have) something to eat?
15.I used......(smoke) 20cigaretts a day, but now I give up.....(smoke)
16. It's difficult.....(get) used to........(eat) with chopsticks
17. Let me.......(pay) for the meal. You paid last time
18.He agrees.......(start) the job as soon as possible
19. My family is trying....( decide) where to go on holiday
20 Our teacher made me......(answer) all the questions.
21.It's no use......(try).....(persuade) him. You won't succeed
22.Marry needs.....(find) another job. Her company is going out of businness
23.He tried.....(avoid).....(anwer) my questions.
24. I considered...(apply) for the job but in the engI decided......(not apply) for it
25. Sandra gave up.....(try) yo find a job in this country and decided........(go)
26. Are you looking forward to...(see) Ann again. Well, I expect....( meet) her son.
27 The teacher told everybody.....(be) quiet, but they just went on...(talk)
28 I'm trying......( repair) my radio, but it doesn't work
