Mr. Chen has two __________. A: tooths B: teeth C: teeths D: toothes

We should brush our __________ twice a day. A: tooth B: teeth C: tooths D: teeths

Dr.Smith is going to pull out one of my _________. A: teeth B: tooth C: teeths D: tooths

The girl often brush her( )before she goes to bed. A: tooth B: tooths C: teeth D: teeths