1 . 直到有些动物灭绝了，人们才意识到保护环境的重要性。（not until的强调句）
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2 . 为什么不爬到山顶上呢？在那里我们可以更好地看到整个城市。（why not; 定从，view (n.) ）
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3 . The road being under construction, the citizens have no choice but ________ (ride) bicycles to go to work or go to school.
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4 . Two thirds of the earth’s surface__________water.
| A．is | B．are | C．have | D．was |
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5 . __________great fun it is to have a bowl of ice cream on such a hot day!
| A．What | B．What a | C．How | D．How a |
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6 . —Tom had a good time at the party.
—__________，and__________.
—__________，and__________.
| A．So he had；so did I | B．So had he；so I did |
| C．So he did；so did I | D．So did he；so I did |
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7 . It is__________that I’d like to go on a picnic.
| A．a very lovely day | B．too lovely a day | C．such lovely a day | D．so lovely a day |
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8 . You__________obey the traffic rules.
| A．supposed | B．supposed to | C．are supposed to | D．are supposed |
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9 . _________ early and you can see the beautiful sunrise on the horizon.
| A．Getting up | B．To get up | C．Get up | D．Got up |
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10 . The tower, _________ was destroyed in the terrible storm, has been repaired.
| A．the roof | B．which roof | C．its roof | D．the roof of which |
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