高考考试

【单选题】Most parents encourage their children to take an active part in social events, ______ those events do not interfere with their studies.
A、lest
B、so that
C、unless
D、provided

网考网参考答案：D
网考网解析：
[解析] provided(that)/providing(that)=only if如果，只要。从句谓语动词用一般时态。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>