—Do you mind __________ alone at home?— Not at all. She is old enough to take care of herself.
5. About 40 _____ of the population of that country _____ on farms.
4. _____ can be done _____ been done.
3. He played on the _____ for two hours and when he returned he found half his goods _____ stolen.
2. The League secretary and monitor _____ asked to make a speech at the meeting.
小测验1.The whole class _____ the teacher attentively.