The students have cleaned the classroom, ____ ?
A: do they
B: don’t they
C: have they
D: haven’t they
A: do they
B: don’t they
C: have they
D: haven’t they
举一反三
- They have to work at once, ______ A: have they B: do they C: don"t they D: haven"t they
- We don’t imagine the twins have arrived, ______ A: do we B: don’t we C: have they D: haven’t they
- I don't think Mary and Sue before, ? A: have met;haven't they B: have met;have they C: have seen;do I D: have seen;don't they
- They have no time to visit the museum, _____? A: do they B: haven’t they C: don’t they D: will they
- I don't think you have a good time, ______ A: haven't you B: have you C: do I D: don't I