用am,is,are填空
1)I_____astudent.2)You____adoctor.3)____shefromJinan?
4)_____youAmerican?5)It_____acar.6)They____cars
7)____yourmotherinChina?8)_____yourfriendsinNewYork?
9)What____hername?10)These_____buses.11)Those_____oranges.
12)Where_____hermother?13)Howold_____yourteacher?
14)Whatclass_____youin?
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