单选题______ he is into the video game, it is hard for him to think about anything else—all his attention is on winning the game.AOnceBUnlessCWhetherDUntil
单选题
______ he is into the video game, it is hard for him to think about anything else—all his attention is on winning the game.
A
Once
B
Unless
C
Whether
D
Until
参考解析
解析：
句意：他一旦进入游戏当中，就很难考虑别的事情——他所有的注意力都集中于赢得比赛。once引导从句，意为“一旦…就…”。unless如果不，除非。whether是否。until直到。结合句意，可知答案是A项。
句意：他一旦进入游戏当中，就很难考虑别的事情——他所有的注意力都集中于赢得比赛。once引导从句，意为“一旦…就…”。unless如果不，除非。whether是否。until直到。结合句意，可知答案是A项。
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