To be on safe side,we___fill up the thank now,because we____run out of gas on the way.

问题描述:

To be on safe side,we___fill up the thank now,because we____run out of gas on the way.
A could;could
B should might
C should;would
D could;might

B
should表示应该,是自己的准备
might表示推测,是自己如果没有那样准备造成的后果,