Some teenagers _______ their health because they often expose themselves to so m

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Some teenagers _______ their health because they often expose themselves to so many electric products.

A．have damaged

B．are damaging

C．damaged

D．will damage

答案

解析

略

举一反三

30. The subway __________in our city, and I’m sure there will be fewer traffic jams in the future.

A．is building

B．is built

C．is being built

D．will build

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What I said and did at your house last night_________just between you and me.

A．is

B．are

C．have been

D．had been

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The price_________recently. I wonder whether it will remain so.

A．was going up

B．went up

C．has gone up

D．has been going up

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What an accident! If the driver_________ carefully, things would not be as they are.

A．has driven

B．drove

C．had driven

D．was driving

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Mum, you really need to have a rest! You in the kitchen ever since you came back home three hours ago.

A．had worked

B．were working

C．have been working

D．worked

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