Chia động từ trong ngoặc

Bài tập 4: Chia động từ trong ngoặc:
1. I(see) ........................him when I (be)....................... on my way home.
2. When he (be) ..........................young, he (use) .............................(smoke)................... a lot.
3.George (have)........................ a terrible accident when he (be) ................... a child.
4.When Jane (take)................a bath, the phone (ring)............three times.
5.When we (live)..............in London,we (meet)....................many interesting people.
6.Where (be).................. my friends when I most (need)....................them?
7.When I (drive) ....................,I (listien).....................to a very interesting radio program.
8.Who you (meet)................when you (arrive) ............. to the party?
9.While I (speak)...............,they (think)...................of something else!
10.I (have) ..................many problems when I (be)................. a teenage
11.I (hurt) .................my knee when I (play)....................football.
12.When we (get)................ready for the picnic, it (start).......................... to rain
13.I (cycle)..................... through for the park,when I (hear) .................. a strange noise 
14.I (fall).......................asleep while I (watch) ...................... TV last night
15.He (pass).................... her a message when the teacher (not look).................
16.Robert (fall)................ off the ladder when he (pick).................cherries.
17.While we (drive)................ to Florence the car (break)................... down.
18. When the girls (arrive)..................,the boys (swim).................
19.I (jog).................in the park,when two squirrels (cross)................my way.
20. While she (speak)....................on the phone, the milk (boil)...............over.
Bài tập 5:Tìm,gạch chân dưới lỗi sai trong các câu sau và sửa lại cho đúng.(Nếu có) 
M:1.Water boils at 100 degrees Celsius.         OK
M:2.The water boils.Can you turn it off?           is boiling
3.Look! That man tries to open the door of your car.         
4.Can you hear those people?What do they talk about?
5.The moon goes round the earth in about 27 days.
6.I must go now.It gets late
7.I usually go to work by car
8."Hurry up!" It's time to leave."OK,I come"
9.I hear you've got a new job. How do you get on?
10.Paul is never late.He's always getting to work on time.
11.They don't get on well.They're always arguing.