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If a man ______ succeed, he must work as hard as he can.

  A. will    B. is to    C. is going to    D. should

If a man_______succeed, he must work as hard as he can.

A. will　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 B. is to

C. is going to　　　　　　　　　　　　　　　　　　　　　　　　　 D. should

If a man _____ succeed, he must work as hard as he can.

A. will 　 B. is to　　 C. is going to 　 D. should

If a man _____ succeed, he must work as hard as he can.

A. will 　 B. is to　　 C. is gong to　　　 D. should

If a man _____ succeed, he must work as hard as he can.
 A. will    　　　　　 B. is to　　　　　   C. is going to　　　   D. should