___pollution control measures are expensive,many industries hesitate to adopt them.

问题描述:

___pollution control measures are expensive,many industries hesitate to adopt them.
A.Because
B.On account of
why choose B

答案错了.on account of=because of,后面只能接名词,不能接句子,所以是A,答案不一定是队的.because后面可以加一句句子