还有一题：大全补充250---218

让我想一想

218.    The domesticated camel, which some scholars date around the twelfth century B.C., was the key to the development of the spice trade in the ancient world.
(A) The domesticated camel, which some scholars date
(B) The domesticated camel, which some scholars having thought to occur
(C) Domesticating the camel, dated by some scholars at
(D) The domestication of the camel, thought by some scholars to have occurred
(E) The camel’s domestication, dated by some scholars to have been
不明白现在完成时后面怎么可以跟一个具体的时间呢？这里是around the 12th century B.C.,初中不就说过不可以的么？

dreadpower

我觉得选D，现在完成时后面不能接具体时间吗？？这个我不知道，哎，初中从不好好学习更不谈英语了，惭愧

   我是从句子意思上理解的，主语是the domestication of the camel，驯化的过程应该不是过去一个时间点完成的，肯定要持续一段时间所以用完成时