This is a chair.A.这是一张桌子。 B.这是一把椅子。
This cow is big . A. a B. an C. /
—Is that interesting story ? —Yes , it is . A. the B. a C. an
We call it a pen English . A. to B. at C. in
Ais a calf’s mother . A. horse B. cow C. cat
this a horse ? Yes , it . A. Is , isn’t B. It , is C. Is , is