What's this卫生间挑战，你答对了几个？
目前是广告占位区域
What's this?
It's a toothbrush.
What's this?
It's a toothpaste.
What's this?
It's a mouthwash.
What's this?
It's a dental floss.
What's this?
It's a toothpick.
那如果你牙疼,你要说toothache,I have a toothache.
那如果这样的话,你要去看牙医,you need to go to the dentist.
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