4.1 1.first 2.third 3.fifth 4.eighth 5.twentieth 6.eleventh 7.forty-second 8.eightieth 9.fifty-fourth 10.ninetieth
4.2 1.Unit one或the first unit 2.Page 86 读作：page eighty-six
3.Room 318 读作 room three one eight
4.September 1，2010 读作：September 1st ，twenty ten
5.June 1st
6.eight fifty或ten to nine
7.hundreds of workers 8.the first day of a week