国槐尺蠖幼虫老熟后在（）化蛹。
A.树干上
B.树杈上
C.叶片上
D.土里
参考答案：D
—When can we see the movie “Avatar”? My patience _____.
—It has been on in our city so far.[ ]
A. has run out
B. has run out of
C. is running out
D. is running out of
请简述外汇管制的目的。
