We had better hurry.Our teacher       us.
A．wait forB．must wait for
C．must be waiting forD．has waited for
C
“must+不定進(jìn)行”表示對(duì)現(xiàn)在動(dòng)作的推斷。句意為：我們最好快點(diǎn)。老師一定在等著我們。
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