You have made great progress in your studies of English, haven't you?

Yes, but much ________.

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A．remains to do

B．is remained to do

C．remains to be done

D．is remained to be done

You can take as many as you like because they are free of ________.

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According to recent reports, one of the rare animals, ________ crocodile, is in ________ danger of dying out.

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We had a good laugh ________ that funny story.

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Shall we go shopping this coming Saturday?

Sorry, but I'm busy on Saturday. Can I ________？

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He has made another discovery, ________ of great importance to science.

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The moment he arrived, he found that hot, damp climate didn't ________ him.

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We spend as much tune as we can ________ English every morning.

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The young man rushed out of the room, ________ into his car and started it hurriedly, ________ to get home as soon as possible.

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________ I'll go over all these lessons before the exam.

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