问题 
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A special-purpose lane system is probably advantageous in that______.A.it would require on
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There is little water in the cup, _________?A、isn’t thereB、is thereC、isn’t it
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Both approaches agree on what is depicted in the poem, but not on how it should be ______.
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In "I think it impossible for man to live on the Mars", "it" is the ______ of the sentence
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It is essential that the glass ______ thicker on the outside than on the inside and that t
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It is reported that Latin American customers talk ______ on the phone as people in North A
 
 
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