题目内容

Now one of the most serious problems many people are worried about _____ on the lack of adequate housing space.
A.insistsB.dependsC.agreesD.focuses
D
考查动词:这些动词都可以和on搭配,A. insists坚持,B. depends 依赖 C. agrees同意 D. focuses专注,句意:现在很多人担心的最严重的问题重点在房屋空间缺少上。选D。
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