哪一个问题与 “Yes, they are playing soccer” 对应？

问题

Read the answer (A). Pick the correct question (Q).

A. Yes, they are playing soccer.

答案选项

1. Q. Are they playing soccer?
2. Q. Is they playing soccer?
3. Q. They is playing soccer?
4. Q. They are playing soccer?

说明

要构成标准的是/否疑问句，在 Present Continuous 中把助动词 be 放在主语前面：Are + they + playing soccer?

代词 they 需要 are。“They are playing soccer?” 保持陈述句词序；本练习要求使用带主语—助动词倒装的标准疑问句。