IV
1 saw
2 haven't seen
3 didn't recognize
4 lost
5 to buy
6 have stood
7 decided
8 not to try
9 to get
10 roamed
11 had become
12 appeared
13 has lost
14 was
15 did - lose
16 was
17 was having
18 saw
19 didn't recognize - lost
V
1 It took us two hours ro finish the work
2 We find it necessary to advertise this new kind of soap
3 I'm looking forward to going to London next week
4 He has played football for 5 years
5 Whose is the car which is parked outside?
6 We are going to pain the room next week
7 Those letters must be finished by 5 o'clock
8 Because he drove too fast, he caused a serious accident
9 It took her thirty minutes to write a letter
10 Tom has difficulty meeting people
12 I expect him to get there by lunch time
13 I wish I hadn't spoken to him so severky yesterday
14 If he doesn't phone immediately, he won't get any information
15 If we had had a map, we wouldn't have got lost
16 If we had had enough rain, we could have grown rice
17 It was such clear sky that I could see millions of stars
18 The homework was so long that I couldn't finish it