题目内容
3. The boy usually stays up late to play computer games Saturday night.
A. at B. on C. in D. by
3. B
3. B 在几点钟用介词at;具体到某一天或某一天的上午、下午或晚上时，用介词on。
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题目内容
3. The boy usually stays up late to play computer games Saturday night.
A. at B. on C. in D. by
3. B 在几点钟用介词at;具体到某一天或某一天的上午、下午或晚上时，用介词on。