---Could I use your bike?-Yes of course you.A. couldB. canC. mustD. need

问题补充：

---Could I use your bike?

---Yes, of course you.

A. could

B. can

C. must

D. need

答案：

A. could

(答案→)B. can

C. must

D. need

解析：考查情景交际。“我能用一下你的自行车吗？”“好的。当然可以。”could放句首表示委婉请求，回答用can或can’t。故选B。