Put each verb in brackets into an appropriate form.

1.  By the time the war is over, thousands of innocent people ( kill)_________.

2. Tom will never forget ( send)______ to a boarding school when he was just 8 years old.

3-4. The accident ( report)_______(cause)________ by a reckless motorist.

5. Many people (invite) ______ to the party couldn’t come because it rained heavily.

6. In her report, she mentioned (treat)  ______  at a hospital abroad last year

7. Hardly our teacher (enter)________the classroom when it started to rain.

8. Bi Rain, together with 58 members of the South Korean National Military Symphony Orchestra and 17 traditional musicians, (come)_________to Vietnam since yesterday.

1. The accident (report)……… (cause) by a reckless motorist.

2.  My children enjoy (allow) (stay)……………….. up late when there is something special on TV.

3. Jane, together with her parents, (just go)………… to London (see)………. her grandmother.

4. He (drive) ………..for three hours but he (cover)…….. only half of the way so far.

5. Last night we (have) ……..a party when the fire (break) …………out.           

6. We've lost the camera. If we (lock) ………..the car window, we (not get)… into trouble now.

7. You must (speed) ………….at that time; otherwise, the policeman (not stop) ……….you.

8. It’s necessary that the campaign (raise) ………….funds (start) ……………at once.

9. Hardly he (get)…………… downstairs when the phone stopped(ring)……………

10. It is time the government (help) ……………the unemployed (find)………………. some jobs.

II . Give the correct tense or form of the verbs in brackets. Write your answers in the spaces given.

1.    (Lose) ………….my keys, I didn’t know how (get) ………in the house.

2.    Last year I (make)……….. (clean) ………..the classroom for two weeks.

3.    He (not have)……….. the accident if he (not drive) ………so fast.

4.    John (water) ……….the flowers when it (start) ………….to rain.

5.    When we (get) ……….to her house last week, she (just leave)………….

6.    She (come)…………….. at 9 am. So, she (be) ……………here for more than 4 hours.

7.    My parents would rather I (find)… a job, but I’d rather (go) ..to university for higher education.

8.    Jane (do) the test again at the moment because she (not pass) ……………it the first time.

9.    The man (sit)…………. next to me was nervous because he (not fly) …………before.

10. I (never forget)……….. what you (just tell) ……..me, I promise.

I. Put the verb in the bracket into the correct form

1.  I …………………. this film twice.  (see)

2.  The train ………………….when we got to the station. (just, leave)

3.  It is raining now. It began raining two hours ago. So it …………………. for two hours. (rain)

4.  As soon as Martina (see) ……………..  the fire, she ………….the fire department. (telephone)

5.  Before Jennifer won the lottery, she …………. any kind of contest. (not, enter)

6.  Every time Parkas sees a movie made in India, he ……………homesick. (feel)

7.  The last time I ………………….in Athens, the weather was hot and humid. (be)

8.  After the race …………………., the celebration began. (win)

9.  At this time tomorrow, we …………………. our final exam. (take)

10.   Peter said he ………………….a test the following day. (have)

11.   I will tell Anna all the news when I ……………… her. (see)

12.   Before the invention of the steamboat there ……………… no way to cross the ocean. (be)

13.   He said that he ……………… his homework since 7 o’clock. (do)

14.   She won't get married until she ………………25 years old. (be)

15.   After Mary ……………… her degree, she intends to work in her father's company. (finish)

16.   By the end of this month, I………………English for 6 years. (learn)

17.   Up to now, I ……………… a lot of information about her.  (know)

18.   This house ………………35,000 pounds in 1980. (cost)

19.   I don’t remember where and when I………………her. (meet)

20.   At this time yesterday I ……………… to music. (listen)

21.   Bill (have) ………………breskfast when I stopped at this house.

22.         It (rain………………heavily when I (sleep) ……………… yesterday afternoon.

23.   He (do) …………… a lot of jobs before he (work)……………in this company.

24.   After they (visit) ………………. Paris, they (go) ………………to Manchester.

25.   Before I could say anything, they (admit) ……………… their mistakes.

26.   I (hit) ……………… my thumb while I (use) ………………. the hammer. Ouch! That (hurt) ……

27.         While I (read) ………………books in the living room last night, I (hear) ……………… a strange noise in the kitchen. I (go) ………………to the kitchen, (turn) ………………. on the lights. I (hold) ………………my break and (listen) ……………… carefully. I (realise) ……………… that a mouse (chew) ………………on something under the cupboard.

28.       The vase broke when it (move) ……………… to the other room.

29.     When I entered his room, I saw him (sleep) ……………… in a chair.

30.     If only I (have) ……………… money with me, I (lend) ………………you some.

31.     Why are you under the table?    You (look) ………………for something?

32.     David (wash) ……………… his hands. He just (repair) ………………the TV set

33.     The radio (play) ………………since 7 a.m. I wish someone would turn it off.

34.       Mr. Brown just (finish) ……………reading the letter when the telephone  on his desk ( ring) …

35.       Those students who ( fail) ……………… the exam are going to take another one held in August

36.       Hurry up or you (be) ……………… late for class.

37.       Hurry up or our favourite TV programme ( be) over long before we ( reach) home

38.       I (not have) ………………much time for entertainment these days.

39.       Two robbers (put) ………………in prison (escape) ………………yesterday.

40.       It is 2 years since I (last give) ………………presents on Christmas day.

Hòa tan 6 muối sau đây vào nước: NaCl, NH₄Cl, AlCl_3, Na₂S, Na₂CO₃, C₆H₅ONa thành 6 dd, sau đó thêm vào muỗi dd 1 ít quỳ tím. Hỏi dd có màu gì? Vì sao?