Catching _____ sight of their head teacher coming, the students fell into silen

题型：不详难度：来源：

Catching _____ sight of their head teacher coming, the students fell into silence all of _____ sudden.

A．the; the

B．/; a

C．the; a

D．/; /

答案

解析

试题分析：考查冠词和固定搭配。此题可以使用排除法来做。catch sight of sth看见某物，是固定搭配，排除A、C；all of a sudden突然，相当于suddenly，是固定搭配，排除D，故选B。

举一反三

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