{01}(2013·四川省乐山一模)The pupils were playing games in the classroom ________ a gunman entered and began shooting wildly at them.
A.while
B.when
C.as
D.before
解析:选B 考查连词。句意:学生们正在教室做游戏,这时一名持枪的男子进来并对着他们开始疯狂扫射。连词when意为“这时”,可接短暂性动词。 本题选B。 {02}---When choosing furniture, you focus on function while I think more about the design. ---That’s_____we differ.
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