How long is it ________________ we last had a picnic together?_刷题宝

题干

How long is it ________________ we last had a picnic together?

A：until

B：before

C：that

D：Since

上一题下一题 0.0难度选择题更新时间:2017-12-13 06:02:16

答案(点此获取答案解析）

D

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