1 D
2 D
3 B
4 A
5 B
6 C
7 C
8 C
9 B

1 was raining
2 arrived
3 will ... be doing
4 will have ... bought 

1 A
2 C
3 C

... I had something to eat

1 went
2 moved
3 took
4 found
5 had arrived
6 were having
7  was
7 laughted
8 invited
9 

1 do
2 don't
3 doesn't
4 am
5 wasn't
 Ex 3:
1 loves
2 Does ... read
3 Did ... write ( câu này kì quá ^^)
4 Are... having

1 D
2 B

1 gave
2 went

8D
9C
10A