本贴相关题目 TN-14-SC-32 (DOZH)

00:00:00

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.

Aa reasonably clear picture has emerged of the patterns and causes of ocean currents
Ba reasonably clear picture of the patterns of ocean currents and their causes have emerged
Ca reasonably clear picture emerged of ocean currents, their patterns and the causes of them
Dthere have emerged a reasonably clear picture of the patterns of ocean currents and what caused them
Ethere had emerged a reasonably clear picture of the patterns of ocean currents and their causes

正确答案: A

请教一道GWD

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jetking

楼主

发表于 2008-6-2 23:35:00 | 只看该作者

请教一道GWD

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.

a reasonably clear picture has emerged of the patterns and causes of ocean currents
a reasonably clear picture of the patterns of ocean currents and their causes have emerged
a reasonably clear picture emerged of ocean currents, their patterns and the causes of them
there have emerged a reasonably clear picture of the patterns of ocean currents and what caused them

E，there had emerged a reasonably clear picture of the patterns of ocean currents and their causes

答案是A。为何？