—Isn't it hard to drive downtown to work?—Yes，that's why I_______

—Isn't it hard to drive downtown to work?—Yes，that's why I________to work by train.

#99169

have been going

have gone

was going

will have gone

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—Thank you for your coffee.—But you________ it.

#102938

didn’t drink

aren’t drinking

don’t drink

hadn’t drunk

---Is dinner ready?---Not yet. The main course ______. It needs another ten minutes.

#100637

was not done

had not done

is not done

has not done

If we _________ now to protect the environment, we’ll live to regret it.

#100580

hadn’t acted

haven’t acted

don’t act

won’t act

—What’s the noise outside?—Some children_____ hide-and-seek in the yard.

#101214

were playing

are playing

have played

played

With the development of science, more new technology         to the field of IT.

#100766

has introduced

is being introduced

is introduced

was introduced

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