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1 Choose the correct variant.
1) You____________(must / can) drive carefully near the crossing.
2) The water____________(was able to / couldn’t) be cold. It has been very hot
these days.
3) The elephants______________(mustn’t / are not able to) stand the mice.
4) My Granny____________(could / mustn’t) speak several languages.
5) People____________(mustn’t / are not able to) litter in the city.
6) He was weak and everybody____________(had to / was able to) beat him.
7) (Can / Could)___________you hear a strange noise out there?
8) We_____________(could / had to) smell something burning.
9) The children____________(are able to / mustn’t) talk with their mouthful.
10) She is a perfect psychologist. She____________(was able to / had to) persuade
me to come.
2 Complete the sentences using can or be able to. Use the proper tense forms.
1) Harry has travelled a lot and he________speak three languages.
2) I haven’t__________sleep well this night.
3) Sam________drive but he hasn’t got a car.
4) She used________do karate.
5) He________drive slowly if he wants.
6) I can’t understand George. I________never understand him.
7) Be careful with the reptile. It________be poisonous