（2018·海淀二模）I need help now! I have to fix a leaking pipe in my bathroom but I’m

题干

（2018·海淀二模）I need help now! I have to fix a leaking pipe in my bathroom but I’m not sure ______to begin.

A．what	B．which
C．where	D．when

上一题下一题 0.4难度单项选择更新时间:2018-05-30 07:31:40

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