1 . 只有我们做出共同的努力, 我们才能创造一个更和谐的世界。
Only if________________________________________ .
Only if
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2 . Jack was on the point of leaving ________ he noticed a man coming out of the room.
| A．when | B．while | C．after | D．before |
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3 . In our class there are 50 students, ________ half achieved a score of 140 or higher in the English examination of Gaokao.
| A．of them | B．in whom | C．of whom | D．in them |
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4 . The big prize will be awarded to ________ wins the first place in the English speech competition.
| A．wherever | B．whoever | C．whatever | D．whomever |
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5 . 哪怕这项新的科学发现应用于工业生产中可能要等上好几十年的时间，这也是值得的。(before) (汉译英)
_________________________________________________
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6 . 互联网时代创造了共享经济，唯有谨慎对待，我们方能从中受益。(unless) (汉译英)
_________________________________________________
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7 . Given that cleaning up the environment is a collective effort, we will not be able to achieve significant progress ______ everyone takes responsibility for their action.
| A．while | B．since | C．until | D．unless |
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8 . True equality and excellent education are timeless issues ______ we should strive for and gain further insights into.
| A．where | B．why | C．when | D．which |
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9 . ______ counts now is not to blame anyone but to make a united effort to solve the problem.
| A．How | B．What | C．That | D．Which |
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10 . There is a river near my home, into which large quantities of waste water _______ poured every day in the past.
| A．were | B．have been | C．was | D．has been |
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