11.［2012咸阳模拟］It rains very heavily in this area, which has ______ annual rainfall of 7, 000 mm, ______ ideal environment for forests.
A. the; an B. an; 不填 C. an; an D. 不填; the
12.［2012福州模拟］Time ______ for the trapped miners, so we have to work hard to get them out.
A. has been run out B. is running out C. is using up D. has used up
