7.A.across B.to C.from D.through
8.A.valid B.enormous C.various D.proper
9.A.As soon as B.As well as C.As much as D.As possible as
10.A.shown B.exposed C.faced D.covered
11.A.but B.because C.so D.so that
12.A.get B.make C.have D.do
13.A.earth B.atmosphere C.space D.environment
14.A.pieces B.units C.parts D.elements
15.A.receive B.accept C.bring D.catch
16.A.conventional B.commonC.general D.normal
17.A.shifts B.converts C.modifies D.varies
18.A.what B.which C.that D.why
19.A.put up with B.keep up with C.come up with D.catch up with
20.A.from B.than C.as D.away
1.
【答案】D
【解析】act as 充当、起 作用 ;act for 代表、代理 ;act on 按照 。本句意为大气层起到保护伞的作用。
2.
【答案】C
【解析】见上题分析。
3.
【答案】D
【解析】be essential for 对 来说是首要的、基础的 ,固定搭配。
4.
【答案】C
【解析】只有eat与先行词food和定语从句which we 搭配。
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