.I’m sorry, but I had no alternative. I simply ______ what I did.a. must do b. had to do c. ought to have done d. have to do
We were just about ready to leave _____ it started to snow.
It’s a mistake to think of Chongqing only ______ its tourist attractions.
Is this the young engineer ________ you want to have ________ the computer for me?
-----They used to be good friends, but now they are like strangers. ----- How _____ this ______?
This new-type machine____________ little room.