Most parents encourage their children to take an active part in social events, _

游客2025-05-04 12

问题 Most parents encourage their children to take an active part in social events, ______ those events do not interfere with their studies.

选项 A、lest
B、so that
C、unless
D、provided

答案 D

解析 provided(that)／providing(thet)=only if表示“如果，只要”，从句谓语动词用一般时态。

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