—I use your dictionary Tom?—Of course you A. Can; could B. Could; canC. Could; couldD. C

问题补充：

—I use your dictionary, Tom?

—Of course, you

A. Can; could

B. Could; can

C. Could; could

D. Can; might

答案：

A. Can; could

(答案→)B. Could; can

C. Could; could

D. Can; might

解析：could在形式上是can的过去式，但有时他并不表示时态而是一种委婉语气，比can 更有礼貌。