—Is it difficult for you to understand this passage?—Yes, there aren’t any new words in it.A.because B.though C.so
These boxes ______ for keeping the food clean and cool.
My parents asked me ______ my sister with her schoolwork.
Sir, would you mind not _____ here, please?
Miss Green isn’t in the office. She_______ to the library.
I didn’t hear your call because I ______ to music at that time.