27 lf we continue to pollute the environment many endangered species ... . .. . extinct .
А will become В become С аге becoming
28 We should take the children ....... for а walk. lt 's а Lovely day!
А out В away С off
29 I went to Berlin two years . . ..... .
А since В before С ago
30 We can .... .. . а birthday рагtу. It'll bе fun!
А throw В practise С move
31 lf уоu' rе tired, you should ....... some rest.
А put В get С take
32 Mike is .. ..... Pete. They will both do well in the exam.
А as clever as В cleverer than С most clever
33 I .............. my ankle and it really hurts.
А 've twisted В 'm twisting С 've been twisting