gwd17-32

dbearwanger

Navigators have known for thousands of years that the ocean has variable currents, but it is only in the last half century that a reasonably clear picture has emerged of the patterns and causes of ocean currents.

 

1. a reasonably clear picture has emerged of the patterns and causes of ocean currents
2. a reasonably clear picture of the patterns of ocean currents and their causes have emerged
3. a reasonably clear picture emerged of ocean currents, their patterns and the causes of them
4. there have emerged a reasonably clear picture of the patterns of ocean currents and what caused them
5. there had emerged a reasonably clear picture of the patterns of ocean currents and their causes

   Answer: is A    why? thanks

我是魔鬼

B。主谓不一致。picture...has emerged

C。their,them指代不明

D。E就不说了吧

xianwhartons

我觉得A的时态不一致

B的主语是pictures and causes 用have emerged是没有错的呀

NN们请教!

xiaoqinqin

B的主谓没错，但their可以指代Patterns也可以只待causes，所以错

cindybaobao

b主谓不一直呀，主语picture...谓语have emerged
C的表达有问题吧picture emerged of ocean currents，应该是picture of ocean currents emerged吧