18.Tony: Will you go to Cindy's party tonight?
Jane: No, I have to do my homework. Don't you have___
Tony: Well, I already finished it at school.
(A) you (B) your (C) yours (D) you're
17. Grace: How many people ___in the office when the fire happened?
Harry: Five. Luckily, nobody got hurt.
(A) did they (B) had they (C) were there (D) would there be