2. 专升本
  3. Now the air pollution in this city______more and more serious with each passing day.

Now the air pollution in this city______more and more serious with each passing day.

admin2017-05-31  31
问题 Now the air pollution in this city______more and more serious with each passing day.
选项 A、to become
B、became
C、becoming
D、is becoming
答案D
解析
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