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- 61The classroom is so dirty that it needs________ badly.
A.clean
B.to clean
C.being cleaned
D.cleaning
开始考试练习点击查看答案 - 62I'm not familiar with this place. It's the first time I _____ here, you know.
A.am
B.was
C.have been
D.had been
开始考试练习点击查看答案 - 63One third of the class _____ agreed to be volunteers to help the aged this vocation.
A.are
B.is
C.has
D.have
开始考试练习点击查看答案 - 64The United States _______one of the lowest smoking rates -25.5 percent of the population.
A.is
B.have
C.has
D.are
开始考试练习点击查看答案 - 65When the old man______to walk back to his house,the sun______itself behind the mountain.
A.was starting;hid
B.had started;had already hidden
C.had started;was hiding
D.started;had already hidden
开始考试练习点击查看答案 - 66For more than a decade, experts from across the globe ________ on the cure of the disease that way.
A.worked
B.are working
C.have been working
D.were working
开始考试练习点击查看答案 - 67The man insisted that he _____ innocent.
A.was
B.should be
C.be
D.were
开始考试练习点击查看答案 - 68---Are you happy about your present job? --- Why shouldn't I ? I _____ as much , and I enjoy more.
A.am earning
B.earn
C.earned
D.have earned
开始考试练习点击查看答案 - 69-I saw Jane and her mother in the shop around eight yesterday evening. -Impossible. She_______TV with me in my home then.
A.is watching
B.was watching
C.has watched
D.had watched
开始考试练习点击查看答案 - 70His father ________ a letter from him since he left without a word .
A.hasn't received
B.didn't get
C.didn't have
D.haven't heard
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