這是省略的一種
省略中 有 be 動(dòng)詞的 保留到be ,有不定式的 保留到不定式to ,有完成時(shí)時(shí)態(tài)標(biāo)志have / has的 要保留到 have / has.
所以要選D
[-C28] -They haven't finished all the work up to now.-They ______ .
[-C28] -They haven't finished all the work up to now.-They ______ .
A.should
B.ought to
C.are supposed to
D.are supposed to have
為什么選D不選B?
A.should
B.ought to
C.are supposed to
D.are supposed to have
為什么選D不選B?
英語人氣：590 ℃時(shí)間：2019-11-02 13:18:16
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