Teenagers ____ their health because they play computer games too much. [ ]A.

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Teenagers ____ their health because they play computer games too much.

[ ]

A. have damaged
B. are damaging
C. damaged
D. will damage

答案

举一反三

— Have you got any job offers?
— No. I _____.A. waited
B. had been waiting
C. have waited
D. am waiting

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Ladies and gentlemen, please fasten your seat belts. The plane ____.A. takes off
B. is taking off
C. has taken off
D. took off

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用所给单词的适当形式填空。 1. — Where ____ you ____ (go)?
    — I ____ (take) my daughter to the park.
2. — Are you still busy?
    — Yes, I ____ (finish) my work, and it won"t take long.
3. They ____ (work) on the farm now.
4. Listen! The couple ____ (quarrel) in the room.
5. — You"re drinking too much.
    — Only at home. No one ____ (see) me but you.

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— What"s that terrible noise? It"s noisy.
— The neighbors ____ for a party.A. have prepared
B. are preparing
C. prepare
D. will prepare

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Because the shop ____, all the T-shirts are sold at half price.A. has closed down
B. closed down
C. is closing down
D. had closed down

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