Question

【题目】一The plane won't take off the thick clouds move away.

一Let's wait patiently for the announcement from the airport.

A. since B. through C. while D. until

Answer 1

【答案】D

【解析】句意：-直到乌云散开了飞机才会起飞。-让我们耐心地等机场的通知吧。since自从；through通过；while当…时候；until直到…时候。这句话使用的句型是not…until…直到…时候才…，符合句意，故选D。