当你询问“他们正在干什么”时，说：
A. What are they doing ?
B. When do they go home ?
C. Where are they going ?
相关试题
读一读，选出不同类的一项。（共5分）
( )
| A．cold | B．warm | C．windy | D．fly |
( )
| A．season | B．summer | C．fall | D．spring |
( )
| A．three | B．second | C．fourth | D．first |
( )
| A．March | B．April | C．June | D．Saturday |
( )
| A．fly | B．skate | C．swim | D．weekend |
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