试题 试卷
题型：单选题 题类：常考题 难易度：容易
人教精通版（三起点）2017-2018学年小学英语五年级下册Unit 3 Obey the rulers. Lesson 14同步练习
A. Don't throw stones.
B. Don't litter.
C. Don't play on the grass.
D. Don't pick flowers.
E. Don't open the gate.
F. Don't swim in the river (河).
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