根据短文内容，从短文后的选项中选出能填入空白处的选项。其中有两多余选项。 The sevens Cs of a good letter What is the secret of writing a good letter ? Here are two main ones. Don’t try to be fancy .Don’t try to impress your reader .You will be successful if you follow these seven Cs. Clear .Use short ,direct sentences . _71____  Talk as if the reader were right there with you. Above all,don’t use an introduction . Correct .__72___ Don’t guess ,even for spelling .Refer to your dictionary .If you need to, check a reference book too. Use them as much as you need to . Complete. Don’t scatter our points ._73____  This is good organization too. Courteous（恭敬的）. Be friendly rather than overly casual.Peesent yopur information nicely even if you are complaining about something .In all letters , treat them as you want them to treat you . Concise (简明的). Make each point as clearly and briefly as you can. Conversational .  This is really the secret of good writing ._74____ Such a letter has a natural,friendly tone. Let your personality come through naturally . Considerate.__75____Write about what you believe the reader needs or wants to know.Try to be helpful .This will build good feeling toward you. The sevens Cs are about writing letters.But how about school papers ? Use the seven Cs.Write as if you are talking to your teacher or professor. You will be surprised. You’ll almost instantly become a good writer. And you might even enjoy writing from now on.