We consider it necessary that a plan _______ before doing the work.
A．is madeB．will be madeC．should be madeD．made
C

試題分析：is made是一般現(xiàn)在式；will be made是將來時態(tài)；should be made表示應(yīng)該；made是一般過去式。Should是情態(tài)動詞，（表示義務(wù)，責(zé)任）意思是應(yīng)該，計劃被制定所以用被動式。句意是我們考慮到做工作前應(yīng)該先制定計劃是必要的。故選C.
點(diǎn)評：情態(tài)動詞should的意思有很多，此題主要考查should表示應(yīng)該時的用法�？忌斡涍@些用法，根據(jù)具體的語境進(jìn)行選擇。
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