It is reported that ______foreigners come to visit the Great Wall every year.

问题描述:

It is reported that ______foreigners come to visit the Great Wall every year.
A several thousands of B ten thousands
C thousands of D thousands我知道答案就只能是A C之间选择.但我觉得A C没有什么区别?

C 数以千计这是惯用表达法
A 虽然有几个千 几千人 的意思,但英语里不会这样按字面意思表达的.
所以C更合适