单项选择题
Adam: I’m very sorry for stepping on your foot. Bob: (). It's very crowded on the train.
A.That's right B.Don't worry C.I'm fine D.Take it easy
A.Yes, dogs will be out of the question B.Yes, I like dogs C.No, dogs are not good pets D.No l our policy is not particular
A.we'd like to thank you anyway. B.I wish you a safe trip hack. C.would you like to take some questions D.could you expand on it