In fact , the hazy weather problem is so severe now that it has aroused __________ nationwide concern about __________ environmental pollution .
A./ ; / | B./ ; the |
C.a ; / | D.a ; the |
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In fact , the hazy weather problem is so severe now that it has aroused __________ nationwide concern about __________ environmental pollution .
A./ ; / | B./ ; the |
C.a ; / | D.a ; the |