He _______ in his office. I phoned to his office just now, but no one answered.

题型：单选题题类：常考题难易度：普通

云南省曲靖市第一中学2017届九年级上学期英语第三次月考试卷

A、may be B、can't be C、mustn't be D、needn't be

举一反三

— Sorry, she isn't in now.

—Because it has caused lots of pollution. We need better environment.

—________ your answer before you hand in your paper.

—No, you _______. You can also do it online.

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