—________  you play the piano for us?—Sorry, I can't play the piano, but I can sing for you.

—When I first got to Harvard, my awkward English brought me great trouble.——Oh, dear, it _______a struggle for you to keep up with other students.

—Must I finish the work today?—No, you    .

—Where___________I meet you tomorrow morning ?—I haven’t decided the place. But I’ll call you soon.

—— It's no  easy task to catch a ticket on a website that receives l billion clicks daily．一一I can’t agree with you more．There      be errors for every single step