There is a real possibility that these animals could be frightened，__________a sudden loud noise.

The boy talked his mother _____ buying him a new homecomputer.[ ]

He is very angry with his mother, because his mother always him with the best student.

________ have you kept the book —Since last Month. I ____ return it to the library today or I can’t borrow one next time.

What are you doing this weekend–We’re going to the Great Wall if it ________.