_____ are the birds doing? They are singing in a tree.

A. Who
B. What
C. How
D. Where
相關習題

科目:高中英語 來源:專項題 題型:單選題

_____ are the birds doing? They are singing in a tree.
[     ]
A. Who
B. What
C. How
D. Where

查看答案和解析>>


同步練習冊答案