问题
选择题
In such a fierce competition, a person has to make every effort if he ______ .
A．has succeeded
B．is to succeed
C．would succeed
D．will succeed
答案
B
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……。