问题补充：
—Shall I help you with your suitcase, lady?
—Thanks a ton. .
A. If you like
B. Of course you can
C. That couldn’t be better
D. It’s up to you
答案：
A. If you like
B. Of course you can
(答案→)C. That couldn’t be better
D. It’s up to you
解析：考查答案意思，If you like意思“如果你喜欢”，That couldn’t be better意思“那再好不过了”，It’s up to you意思“该你了”，Of course you can意思“当然可以”，根据问句Shall I help you with your suitcase, lady?可以知道答案选C
