— Was his father very strict with him when he was at school?— Yes. He never praised him ________ he became one of the top students in his grade.

题型：单选题题类：模拟题难易度：普通

江苏省无锡市滨湖区2018届九年级英语第一次模拟考试试卷

— Was his father very strict with him when he was at school?

— Yes. He never praised him ________ he became one of the top students in his grade.

A、after B、unless C、if D、when

举一反三

—No. He came at just the right time, _________ too early _________ too late.

—Yes. There is a post office on Center Street.

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