nO one knows ----how the robbery happened in this store last night.Maybe someone broke into th
题目
nO one knows ----how the robbery happened in this store last night.Maybe someone broke into the the store and robbed the valuble watches.
A.to be sureB.make sure C.for sure 为什么?
答案
(A)和 (B)都有动词,所以不能接上前面的动词"knows",只有(C)作为状语时才能接得上
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