If she refuses to answer your phone calls, just ______ calling until she does an

游客2024-07-19 22

问题 If she refuses to answer your phone calls, just ______ calling until she does answer.

选项 A、insist in
B、persist in
C、to insist on
D、to persist on

答案 B

解析前半句是if引导的条件状语从句，可以推断出后半句为主句。从四个选项看出句子主干为祈使句，直接用动词开头。固定短语persist in doing sth．意为“坚持做某事”。

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