问题补充：
—Could I please use your bike?
—. I have to go out.
A. Yes,you can.
B. Yes,you can’t.
C. Yes,I can.
D. Sorry, you can’t.
答案：
A. Yes,you can.
B. Yes,you can’t.
C. Yes,I can.
(答案→)D. Sorry, you can’t.
解析：D根据I have to go out可知，答语是否定的。B项前后矛盾，只有D符合题意。
