题目内容
Many people believe that _______ will takes years to develop a car that does not pollute the air.
A.it | B.that | C.there | D.this |
A
解析

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题目内容
Many people believe that _______ will takes years to develop a car that does not pollute the air.
A.it | B.that | C.there | D.this |
A
解析