问题:
_____ the instructions on the packet when you take the drug and the drug, I think, will work soon.
[ ]
A. Follow
B. To follow
C. Following
D. Followed
_____ the instructions on the packet when you take the drug and the drug, I think, will work soon.
B. To follow
C. Following
D. Followed
[ ]
A. FollowB. To follow
C. Following
D. Followed
参考答案: