请教99-1-12,99-1-15

nkwyl

99-01-12

-----in the desert is mainly due to the limited supply of desert water.

a)       plants are widely spaced

b)      the spacing of plants is wide

c)      plants to be spaced widely

d)      the wide spacing of plants

答案：d

C为什么不能选？

99-01-15

All eels spawn in the sea, the eggs hatching into transparent, ribbonlike larvae-------, feeding until they metamorphose into small eels.

a)       that drift about

b)      drift about

c)      about drifting

d)      drift about them

答案：a

好像应该是a，但是about能这么使用吗？

年代末知

Pigment mixed with water does not dissolve but remains------.

a)       suspending and forming paint

b)      suspend and form to paint

c)      suspended while painting

d)      suspended to form paint

答案：d

如何解释呀？

真老九

先看语法大全

skyisblue_li

plants 是复数，谓语动词是单数；

about这里是副词，不是介词，所以可以这样用；

remains是系动词

nkwyl

谢谢