----- I am certain David has told you his business troubles. ----- ______, it is no secret that he owes a lot of money to the bank.
I don’t know ____________.
-----Would you mind lending me your new car? ----- __________.
-----Can I speak to Mr.Wang? -----Sorry, he’ s out.Can I _____ a message?
-----Have you _____ the invitation to the party? -----Yes, I have.And I’ve ______ it.
I will never forget the day _____ we worked together in London.