1: Mary has answered the teacher’s question...? A: has he B: Didn’t she C: Hasn’t she 2: Your coat got we yesterday.....? A: Didn’t you B: Didn’t it C: Doesn’t it 3: I’m early....? A: am I B: are not I C: aren’t I 4: Those plates are very dirty....? A: are they B: aren’t they C: weren’t they 5: Mrs.Lan was sick....? A: was he B: wasn’t she C: isn’t she 6: The costumes look gorgeous....? A: don’t they B: can’t they C: can you 7: My pen is blue . His pen is red...? A: isn’t he B: aren’t I C: isn’t it 8: We designed our own house....? A: Didn’t they B: did we C: didn’t we 9: It’s getting colder ....? A: is it B: isn’t it C: isn’t he 10: Everyone has left the dangerous area...? A: haven’t they B: isn’t it C: are they 11: Everything happens for a reason....? A: is it B: doesn’t it C: aren’t they 12: Everyone must observe traffic regulations...? A: must they B: mustn’t they C: mustn’t we 13: Hardly a day goes by without thinking of her..? A: is it B: does it C: doesn’t it 14: She has never been to Ha Long Bay....? A: has she B: hasn’t she C: is she 15: Someone has told him about her death....? A: have they B: haven’t they C: hasn’t he