11.How old were (are) you last year?去年应用过去时.
7) Is (are) your mother in China?第三人单数应该用is.
8.Mike and Liu Tao are (is) at school.两个人要用复数are.
12.Who am (is) 我应该用am.
15.Here are ( is) some sweaters for you.衣物的复数应该用are.
16.The black gloves are (be) for Su Yang 手套的 复数应该用are.
17.This pair of gloves is (be) for Yang Ling....一副手套所以用is.
希望能够帮到你.