They have to work at once, ______
A: have they
B: do they
C: don"t they
D: haven"t they
A: have they
B: do they
C: don"t they
D: haven"t they
举一反三
- The students have cleaned the classroom, ____ ? A: do they B: don’t they C: have 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
- They have finished the work, ____? A: don’t they B: haven’t they C: won’t they D: aren’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