________ the earth cooled down, water began to appear on its surface.
A.With
B.Because
C.As
D.While
对258人提供帮助
“随着地球冷却下来,水开始出现在它的表面.”while“当……时候”,后接延续性动词;with后不接句子;as“当……时”,说明两种正在发展变化的情况.
________ the earth cooled down, water began to appear on its surface.
A.With
B.Because
C.As
D.While
对258人提供帮助
“随着地球冷却下来,水开始出现在它的表面.”while“当……时候”,后接延续性动词;with后不接句子;as“当……时”,说明两种正在发展变化的情况.