C. Choose the best option. 1. Doctors many deadly diseases in recent decades. a) cure b) are curing c) have cured 2. In last 100 years scientists a) have split b) split c) are splitting 3. Mary a masters b) doesn't master c) isn't mastering 4. Every twelve months, the Earth a) circles b) is circling c) has circled the atom and discovered DNA. Spanish, but she can communicate. the sun. 5. She help right now. a) needs b) is needing c has needed 6. The students a) have b) are having c have had 7. Paul why he is ill. a) talks b) is talking c) has talked three tests so far this month. to several doctors about his problem, but nobody knows 8. 1 to become a vet. a) study b) am studying c has studied

Ответ:

1. b
2. a
3. c
4. a
5. b
6. a
7. a
8. b

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