People who have regular physical exercise seldom catch a disease like H1N1 Flu, ______?
Nurses in this hospital try their best to make patients feel at _____.
This is a very lovely doll. I’ll buy it _____.
Modern education is _____ sitting at a desk and looking at the blackboard.
You must _____ a wide vocabulary if you want to learn a language well.
People often _____ me with my twin sister as we are so alike.