Now the air pollution in this city ( ) more and more serious with each passing day...

问题描述:

Now the air pollution in this city ( ) more and more serious with each passing day...
A、to become
B、becane
C、becoming
D、is becoming

c能说下原因么⊙ ⊙是d,我前面做错了,is是谓语。 整体看要么是一般现在时要么是现在进行时所以b可以做谓语但是时态不对能做谓语的只有bd谢啦!