All I have learned about the exam____ that three students faileD. A. is B. are C. will be D. have been
——How much do I owe you for lunch? ——______. It’s nothing.
It was along the Mississippi River _______ Mark Twain spent much of his childhood.
The meal over, the managers went back to the meeting room totheir discussion.
She ______ have left school, for her bike is still here.
To know more about the British Museum, you can use the Internet to go to the library, or _______.