试题 试卷
题型：语法填空（单句） 题类：常考题 难易度：容易
人教版（PEP）小学英语六年级上册第四单元Unit 4 I have a pen pal 单元测试
{#blank#}1{#/blank#}.
A. more beautiful
B. to keep the air fresh
C. from trees and plants
D. make beds and pencils
E. with the wood
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