摘要： How can they learn anything they spend all their spare time wandering on the street? A. while B. as C. because D. when
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How can they learn much ________ they spend so much time playing computer games?
| A．although | B．when | C．till | D．until |
How can they learn anything ______ they spend all their spare time watching television?
| A．when | B．though | C．while | D．before |
How can they learn anything useful ______ they spend all their spare time playing online games?
A. while B. unless C. although D. when
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