----- In recent years,___ problem of global warning has been very serious.
------That’s right. People are facing ____ number of natural disasters now.
A.不填; | B.a; the | C.the; a | D.a; a |
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----- In recent years,___ problem of global warning has been very serious.
------That’s right. People are facing ____ number of natural disasters now.
A.不填; | B.a; the | C.the; a | D.a; a |