Catching sight of their headteacher coming, the students fell silence in flash．
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Catching _________ sight of their headteacher coming, the students fell silence in _________ flash．
[]A．the; the
B．/; a
C．the;/
D．/; /
试题答案
答案：B
解析：catch sight of是习语，表示“看见”；in a flash瞬间。