Tom doesn’t like to have long hair.—Yeah. Hishair is shorter than .

Is this a nice school —__________.

填人下面这段文字横线处的语句，最恰当的一组是 （ ） 我们常说的牙垢，实际上包括牙菌斑、软垢和牙结石等几部分。牙菌斑是不可见的，但它是牙周病的罪魁祸首。软垢是口腔里各种残渣的沉积物，是口腔细菌的食粮。牙结石则相当于细菌的城堡，由细菌建造用来藏匿细菌。 ，所以牙垢不能留!

After living in Shanghai for 20 years, the couple returned to the small village ______ they grew up.

Shelly prepared carefully for the exam ________ she could be sure of passing it at the first attempt．（　　）