【題目】Mom, don’t you think it's OK to play once in a while it doesn’t affect my studies?

A. even if B. unless

C. so that D. as long as

【答案】D

【解析】

試題分析：考查狀語從句。A. even if 即使；B. unless除非；C. so that 為了---；D. as long as只要。

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