What’s this? __________.A. It’s a ruler. B. This is a ruler. C. That is a ruler.
看病 A.see a doctor B.be a doctor
doct__ A.er B.in C.or
c__nt A.ou B.uo C.oa
w__r A.ea B.ae C.oe
ex__cise A.er B.re C.ee