.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
If he keeps on working so hard, he will sooner or later.
all the snow in the valley, the cabin still remained warm and comfortable.
You are notto smoke in the hospital.
After the war, the American soldiers returned home,.
Having retired from work, he is with the welfare(福利) of the disabled.