How can they learn so much ______ they spend such a lot of time hanging about?A．_刷题宝

题干

How can they learn so much ______ they spend such a lot of time hanging about?

A．although	B．when
C．before	D．until

上一题下一题 0.85难度单项选择更新时间:2010-07-03 01:59:56

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