1. Students in our school know shouting is not allowed in the library.
A. can B. may C. must D. need
2. --- Is Maria knocking at the door?
--- It be her. She is in Australia now.
A. may not B. needn't C. mustn't D. can't
3. it be true that Albert passed the test in geography?
A. May B. Should C. Could D. Would
