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- 91Cattle ________ one cause of the problems which many parts of the world have become deserts.
A.is
B.are
C.has
D.have
开始考试练习点击查看答案 - 92The researcher said a part of the students ________ absent and part of the work ________ not finished.
A.were; was
B.were; were
C.was; was
D.was; were
开始考试练习点击查看答案 - 93The means as well as other means ________ in the experiment.
A.have been tried
B.has been tried
C.have tried
D.has tried
开始考试练习点击查看答案 - 94Bread and butter ________ my usual breakfast but in this shop ________ sold out.
A.is ;it is
B.is ;they are both
C.are ;they are both
D.are ;it is
开始考试练习点击查看答案 - 95The battle being over, the wounded ________ sent to the nearest field hospital, and the dead ________ buried.
A.was; was
B.were; were
C.is; is
D.are; are
开始考试练习点击查看答案 - 96The children each _______ a new colourful bicycle.
A.has
B.have
C.had
D.had had
开始考试练习点击查看答案 - 97One third of the land _______ covered with ice.
A.are
B.is
C.were
D.have been
开始考试练习点击查看答案 - 98At present over 80 percent of the population of China ________ farmers.
A.were
B.have
C.are
D.is
开始考试练习点击查看答案 - 99To achieve success in business ________ the good will of many people in recent years.
A.was
B.is
C.has been
D.had been
开始考试练习点击查看答案 - 100The writer and teacher ________ to give us a performance .
A.is about
B.are about
C.have
D.has
开始考试练习点击查看答案
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