—I’mafraidthatIcan’tdoit.—Oh,youshouldbelieveinyoursel...

问题详情：

 —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. until       B. because        C. if       D. while

【回答】

A

知识点：连词

题型：选择题