【題目】It's nearly 7 o'clock. Jack ____________ be here at any moment.
A.shall
B.had to
C.ought to
D.have to

【答案】C
【解析】句意：現(xiàn)在已經(jīng)七點鐘了。杰克應(yīng)該會隨時出現(xiàn)的。ought to＂應(yīng)當(dāng)＂，表示推測和可能性；shall常用于主語是第一人稱的句子中，如果主語是第二、三人稱，則表示＂責(zé)備，警告＂等；have to＂必須＂，強調(diào)客觀需要。故選C。

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