-Could I use your computer?

-_________.

---What were you upto when she dropped in?

---I ________ for awhile and ________ some reading.

---The Chinese astronaut Yang Liwei is here already.

---I _____ he _____ until tomorrow.

—Was the trip pleasant when you vacationed in the mountain village last summer?

—No, it ________ for four days when we arrived, so the roads were very muddy.

---You look nervous．

---This thunder makes me ________．

-I have had an ache in my legs, doctor．

-Better ________ a good rest these days, ________?

-What can I do for you, sir?

-I want to change this pair of shoes, they are not ________．

-Ann is in hospital．

-Oh, really? I ________.________ visit her．

-I wonder if you have enough books for us．

-There are ________, I think, ________．