是虛擬語氣
require的從句中用should do表示虛擬
should可以省略
所以用動詞原形
It is required that every student _ a foreign language before going abroad.
It is required that every student _ a foreign language before going abroad.
A.learn
B.learns
C.will learn
D.should have learnt
為啥?
A.learn
B.learns
C.will learn
D.should have learnt
為啥?
英語人氣：986 ℃時(shí)間：2020-02-05 15:29:09
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