下列有关森林古猿进化成人类的叙述不正确的是

A．森林古猿之间在下地之前就有本质的区别

B．由于森林的大量消失，使部分森林古猿不得不下地生活

C．下到地面生活的森林古猿，其身体向直立行走方向发展

D．环境决定了森林古猿的进化方向

--Was the driving pleasant when you vocationed in Mexico last summer?

----No, it ___ for four days when we arrived, so that the roads were very muddy.

A．was raining

B．had been raining

C．would be raining

D．have rained