. —Why are you so frightened?—I saw two dark _______ enter the building.
___in the regulation that you should not tell other people the password of your e-mail account
Most people would agree that nuclear science should be developed to benefit the human beings___harm them
Nowadays,rather than___letters,many people prefer to telephone.
We thought there were 35 students in the dining hall,___,in fact,there was 40
She said she was going to the shops and asked me whether I wanted anything___she was out