题干
---What color_____ the cats?
---I think ________white and black.
A：are ,they're
B：is ,it's
C：are ,it's
D：is,they're
答案(点此获取答案解析）
A
---What color_____ the cats?
---I think ________white and black.
A：are ,they're
B：is ,it's
C：are ,it's
D：is,they're
成立的条件是（ ）
