Acartravelsatarateof50milesperhour.Howlongwillittaketotravel300miles?
Jasonisusedto______(watch)TVthewholenight.
Thecoat_____thewallisn'tKate's.It's______.
_____ is a doctor .What about _____ father?
I have a pen friend，and we always send e_____to each other by computer
mouse________ (复数)
