问题:
I study spoken English by ____.
[ ]
A. join the English club
B. to join the English club
C. joining the English club
D. joins the English club
I study spoken English by ____.
B. to join the English club
C. joining the English club
D. joins the English club
[ ]
A. join the English club B. to join the English club
C. joining the English club
D. joins the English club
参考答案: