Ex4:
1, got; was watching; hadn’t done
2, was (Ha) doing; was swimming
3, was listening; rang
4, were studying
5, didn’t visit; was busy
6, left
7, had had; got
8, didn’t earn; earned
9, were studying
10, was snowing
11, died
12, went
13, was waiting
14, was working
15, had worked
16, was blowing
17, was going
18, broke
19, arrived; was talking; started
20, was lying; rang; stopped
21, was; left; fell
22, went
23, had been driving
24, arrived; was
25, asked; had had
26, said
27, told
