_______ your letter, I am pleased to tell you that you are to receive the answer by the end of this week.
This is not a match.We're playing chess just for________.
I want to buy a blue jacket to ________my blue trousers.
—I just heard that the tickets for tonight's show have been sold out. —Oh, no!________.
________ it is to have a swim in a pool on a hot summer.
Twenty students want to attend the class that aims to teach________to read fast.(2011·辽宁)