I have to work hard the test. A. passB. to passC. for passD. passing

问题补充：

I have to work hard the test.

A. pass

B. to pass

C. for pass

D. passing

答案：

A. pass

(答案→)B. to pass

C. for pass

D. passing

解析：句意：要通过考试，我不得不努力工作。不定式表示具体的将要进行的动作，结合语境可知选B。