试题 试卷
题型：单选题 题类：常考题 难易度：普通
广东省深圳市2018-2019学年八年级下学期英语开学考试试卷
—Because he was on duty.
—Sorry，I can follow you.
—I often run ______ keep fit.
—Sure! It's our responsibility to save energy and make our Earth a better place.
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