问题:
________ he work hard________ his English?
A.Is;to
B.Does;to
C.Do;at
D.Does;at
________ he work hard________ his English?
A.Is;to
B.Does;to
C.Do;at
D.Does;at
A.Is;to
B.Does;to
C.Do;at
D.Does;at
参考答案: