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9．I usually play computer games _____ weekends．（　　）

A．

B．

from

C．

分析我通常在周末玩电脑游戏．

解答答案：A．考查介词．句意"我通常在周末玩电脑游戏．"．at在…from来自…in在…里．在周末通常用at，at weekends表示一件事需连续几个周．答案是A．

点评考查介词用法，这个知识点很广泛，有一些固定用法，需要日常积累，结合语境选择正确介词完成习题．

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