—I’m afraid that I can’t do it.
—Oh, you should believe in yourself. You won’t know what you can do you try it.
A. if
B. because
C. until
D. while
网友回答
A. if
B. because
(答案→)C. until
D. while
解析：考查连词. if 是否,如果;because因为;until直到;while然而,当……时；句意：我担心我做不到。——哦，你应该相信自己。直到你尝试过后，你才能直到自己能做什么。固定结构not…until直到...才，故选C。