单项选择:Some plants are large ____ others are small.
问题描述：
单项选择:Some plants are large ____ others are small.
A.when
B.or
C.while
D.as
请说明理由
答
选C
while 然而,而
一些植物很大,而其它的很小.
The soles are leather,while the uppers are canvas.
鞋跟是皮的,而鞋面是帆布的,