公共英语一级

单选题You are half an hour late．Try to come to class__________time tomorrow.

A．on
B．at
C．by

参考答案：A进入在线模考
句意：你迟到了半小时。明天要尽量准时到教室。本题考查的是固定词组的用法。0n time意思是“准时”；没有at time的搭配；by time意思是“按时间”。故A正确。【知识扩展】0n time准时，按时；at a time一次，每次；at one time曾经，一度；in time及时，迟早；at times有时，不时。

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