On Mars,there is no pollution ___ by traffic.A is caused B c
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On Mars,there is no pollution ___ by traffic.A is caused B caused C that caused D that are caused
B caused ,因为这里是定语从句的省略,完整的句子应该是:
there is no pullution which/that is caused by traffic;
there is no pullution which/that is caused by traffic;
On Mars,there is no pollution ___ by traffic.A is caused B c
We haven't known ____ there is life on Mars.A.that B.if C.wh
There will be no pollution on Mars,()?
___ any books on the desk?A.There is B.There are C.Is there
There is a traffic ( ) on the road.
A:Excuse me,is there a post office near here?B:No.But ___ on
there is a lot of traffic and pollution.为什么用is不用are
1.There is no ____ on Mars,____ is known to all.
there is a small house ( )the trees A.in B.on C.by
NOVA IS THERE LIFE ON MARS怎么样
There is _____ bread on the plate.A.no B.not C.a
There is no[ ] book on the desk A the B a C an D /