11. Most of my students are ___________ to finish their homework on time.
A. enough hard-working B. hard-working enough C. so hard-working D. very hard-working
12. Please turn __________ the lights before leaving the room.
A. on B. off C. up D. down
13. We are trying to do a lot of things to keep the environment______________.
A. pollution B. polluted C. unpolluted D. pollutant
14. Mrs Robison ______________ as a secretary in that company two years ago.
A. worked B. has worked C. works D. is working
15. Her daughter rarely comes back home ______________ midnight.
A. on B. in C. at D. of
Part III. Each of the following sentences has one mistake. Identify the mistake by circling A, B, C or D .
16. Your new teacher has a round face, hasn’t she?
A B C D
17.Betty is devoted to look after handicapped people .
A B C D
18.We started cooking for the party four hours before.
A B C D
19.I wish my parents will come back tomorrow .
A B C D
20. The girl drove so careless that she had an accident.
A B C D
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