All efforts of cloning an animal will be ________ if there is not enough diversi
题型:不详难度:来源:
All efforts of cloning an animal will be ________ if there is not enough diversity in the group to overcome illness.A.in need | B.in place | C.in vain | D.in case |
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答案
C |
解析
词义辨析。A需要;B在合适的地方;C徒劳;D以防万一;结合句意可知C正确。句意:如果没有足够的多样性来克服疾病,所有克隆动物的努力都是徒劳的。 |
举一反三
At the railway station,the mother waved goodbye to her daughter until the train was________.A.out of sight | B.out of reach | C.out of order | D.out of place |
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She owes her success________good luck more than ________ability.A.to;and | B.of;to | C.to;to | D.to;in |
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Learning English means _________ memorizing a huge lot of words.It involves a large amount of reading as well.A.other than | B.more than | C.rather than | D.less than |
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_____professional development, big cities appeal to many young people .A.In favour of | B.In terms of | C.In need of | D.In honour of |
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— The traffic is too heavy. Would you like me to help you the street? — That’s very kind of you. A.beside | B.across | C.opposite | D.over |
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