--Hello, is that Liu Tao?-Yes, ______.A.I am B. it is C. speaking
There is a Chinatown in A.China B.America C.Mexico
There lots of children in the classroom . A.is B.are C.be
It’s about 12600 li long . It’s A.the Great Wall B.the West LakeC.the Changjiang River
There a car in the street . A.is B.are C.be
Mexico is of America . A.south B.in the south C.north