-I’ve decided to attend the English speech but I’m afraid I won’t be the best-

问题补充：

---- I’ve decided to attend the English speech, but I’m afraid I won’t be the best.

---- . You never know until you try.

A. Forget it

B. Go for it

C. Good luck

D. Never mind

答案：

A. Forget it

(答案→)B. Go for it

C. Good luck

D. Never mind

解析：本题考查交际用语。Forget it算了吧，Go for it. 加油，大胆试一试， Good luck祝你好远，Never mind不要紧，根据后面的意思知道你事实你才知道，所以选B。