In such a fierce petition, a person has to make every effort if he .
A. has succeeded
B. is to succeed
C. would succeed
D. will succeed
网友回答
A. has succeeded
(答案→)B. is to succeed
C. would succeed
D. will succeed
解析：句意：在如此激烈的竞争下，一个人要想成功，就必须竭尽全略。If条件句中可用be to结构表示按事态发展，最终会……，或注定会……。