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11. The public has complained that large quantities of waste water ______ into rivers without being cleaned, so large amounts of money ______ to solve the problem.
A．have poured; is neededB．has poured; are needed
C．have been poured; is neededD．have been poured; are needed

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25. When Jack reached the station the train ______ for ten minutes.
A．had goneB．had set offC．had been awayD．had left

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27. I wonder whether the police ______ that lost child or not
A．have foundB．has been foundC．have been found D．has found

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35. It was the fifth time that he ______ to such a meeting.
A．have been invitedB．was invited C．had invitedD．had been invited

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37. I would rather you ______ in my school, Mom.
A．not workB．not workedC．didn’t workD．not working

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40. I could have offered you some help last weekend, but I ______ with my work at that time.
A．would be occupied B．was occupyingC．had been occupiedD．was occupied

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41. If it ______ for the fence, he ______ into the river.
A. were not; fallen                                    B. had not been; could have fallen
C were not; could fall                                    D. had not been; could fall

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50. You won’t be able to see him because he ______ a meeting in Suzhou when you arrive.
A．will have hadB．will be havingC．will haveD．is having

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16. ----It’s getting dark, but Mr. Johnson is still at his office.
----No surprise. Who else can _____ he does?
A．do less work thanB．work as hardly as
C．work as hard as D．be working hardly like

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17. By this time next summer, you _____ a high paying job. But I will still be studying.
A．will findB．a(chǎn)re foundC．have foundD．will have found

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