题目
We must save the trees and not buy things ______ ivory．（ ）
A.
made of
B.
are made of
C.
made in
D.
made by
知识点：过去分词短语章节：词法 / 固定短语
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We must save the trees and not buy things ______ ivory．（ ）
made of
are made of
made in
made by
答案与解析
自由组卷
围绕这道题再组一份练习 →
完整试卷
浏览同年级试卷结构 →