Monday is the day of a week.A. first B. second C. third
______ all the stars, the sun is _______ to the earth.
John arrived _____ London _____ a cold morning.
When you are doing reading exercises, it is a good idea to _______ the questions before you read the articles(文章).
Which sentence is likely(可能)to be spoken by Americans?
— Is your e-friend in Year ______?— No. He is in the ____ grade.