专四
A.thinking
B.study
C.problem
D.concern
【点睛】词汇搭配题。think常与about连用,study则有make a study of的说法,用A、B时,表语后的介词with不妥。若用problem,be后丽直接是表语从句,不用介词。
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最新试题
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根据以下资料,回答题:
Dried foods
Nowadays vegetables are most commonly dried
Alkaline solutions are used to
