It is usually warm in my hometown in March, but it _____be rather cold sometimes.[ ]

It is not I but Mr. Green who ____ in charge of the company.

I phoned you yesterday morning. A girl answered, but I didn’t recognize the voice.— Oh, it ____ my younger sister. She was in my room at that moment.

Your floor is dirty. It needs _______.

Ann, I’m worried I’m getting fatter. What shall Ido—I think you should eat foodand do more exercise.