问题补充：
I shall be in china for three weeks. Can you make some suggestions what I should see?
A. or else
B. as to
C. so as to
D. up to
答案：
A. or else
(答案→)B. as to
C. so as to
D. up to
解析：短语辨析。我将在中国呆三周。你能给我一些建议我应该看些什么？or else 否则；up to直到；so as to 为了； as to 关于，常引导一个从句或短语。
