[求助]OG11-98（已解答）

98. As rainfall began to decrease in the Southwest about the middle of the twelfth century, most of the Monument Valley Anasazi abandoned their homes to join other dans whose access to water was less limited.
   
(A)         whose access to water was less limited
(B)         where there was access to water that was less limited                                                   ,.,:..:;
(C)        where they had less limited water access
(D)        with less limitations on water access
(E)         having less limitations to water access
A is Correct.

请问：在about the middle of the twelfth century中，about有这种表达方法吗？

顶。

about ：a little more or less than a particular number, amount, or size
synonym roughly

about是“大约。。。“的意思，比如：about three years ago

这个表达没错：）