— I missed the earliest flight in the morning. It was really a pity. —You _________ to the airport by taxi instead of by bus.

We can eat in the dining hall. But we _______ eat in the classroom.

(2013·天津高考)No one ________ be more generous; he has a heart of gold.

—_______ I borrow your English book?—Yes, of course you _______. 

—Could I please use your computer?—             .