问题
选择题
How can they learn anything ______ they spend all their spare time watching television?
A．before
B．when
C．although
D．as
答案
答案：B
when表示“既然”。
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How can they learn anything ______ they spend all their spare time watching television?
A．before
B．when
C．although
D．as
答案：B
when表示“既然”。