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1 were - would you play
2 weren't studying - would have
3 had taken - wouldn't have got
4 would you go - could
5 will you give - is
6 recycle - won't be
7 had heard - wouldn't have gone
8 would you buy - had
9 don't hurry - will miss
10 had phoned - would have given
11 were - wouldn't eat
12 will go - rains
13 had known - would have sent
14 won't feel - swims
15 hadn't freezed - would have gone
XVI/
1. going
2. having
3. to wait
4. being/to be
5. reading
6. talking
7. to go
8. cooking
1 D
2 A
3 B
4 B
5 D
6 A
7 C
8 A
9 C
10 A
11 A
12 C
13 D
14 D
15 C
16 B
17 A
18 C
19 B
20 A
1 economically
2 renewable
3 alternate
4 electricity
5 power
6 environmentally
7 transports
8 heat
9 produce
10 shortage
II.
1. D
2. A
3. B
4. C
5. D (đoán thế)
III.
1. playing
2. car
3. hobby
4. flu
5. weight
6. homeless
IV:
1. C
2. C
3. D
20 - A
21 - A
22 - C
20.A
21.D
22.C
mik nghĩ thế nhưng ko chắc là thế