Although metals ________widely in qualities such as strength and hardness，they all have certain qualities in________.
| A．vary；general | B．differ；common |
| C．react；particular | D．refer；detail |
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It was _______ was advertised on TV that made many customers buy the computer which was not so perfect as the ad said.
| A．that | B．which | C．what | D．it |
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Great changes have taken place in that school. It is no longer ___ it was 20 years ago, ___ it was so poorly equipped.
| A．what, when | B．that, which | C．what, which | D．which, that |
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The doctor recommend he _________ a few more days in hospital.
| A．stays | B．to stay | C．stay | D．would stay |
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Seeing your picture, I couldn’t resist _____ the days _____ we spent together.
| A．to think of; when | B．to think of; which |
| C．thinking of; which | D．thinking of; when |
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The young actress looked so charming in her beautiful dress that we took pictures with her.
| A．a great many of | B．masses of | C．the number of | D．a large amount of |