2.Jane——her father for his present an hour ago（thank）
3.The workers—— those chairs the year before last（paint）
4.The old man—— in an office six years ago（work）
5.Mary helped her mother——the cupboard three days ago（dust）
6.That boy——off the wall two minutes ago （jump）
7.The girl in a black and white hat——her boss a minute ago（greet）
8.The keyboard operator——these letters the day after tomorrow（type）