1. Dentists recommend brushing teeth with a fluoride toothpaste to _______ them from decay.
A-defend
B-protect
C-arm
D-guard
2. The athlete ________ a new world record.
A-fixed up
B-won
C-set up
D-arranged
3. The two boys have very ________ characters.
A-likely
B-alike
C-similar
D-same...