—Could I use your phone? —Yes of course you .A. canB. couldC. wouldD. will

问题补充：

—Could I use your phone?

—Yes, of course you .

A. can

B. could

C. would

D. will

答案：

(答案→)A. can

B. could

C. would

D. will

解析：句意：能借用一下电话吗？是的，你当然可以。对Could I…？问句回答可用can，所以选A。