问题补充：
—Shall I give you a hand with this as you are so busy?
—Thank you.
A. of course you can
B. If you like
C. it’s up to you
D. it couldn’t be better
答案：
A. of course you can
B. If you like
C. it’s up to you
(答案→)D. it couldn’t be better
解析：A.of course you can当然，你能够；B.If you like只要你喜欢 C.it’s up to you 有你说的算 D.it couldn’t be better太好了，句意：你这么忙，我可以帮你吗？谢谢，太好了。A中一般不用of course，因为在英语中of course有明知故问的意思，B表达属于中式英语，C 不符合语境。故选D.
