The books, ________ the dictionaries, must be put back where they ________.
---Are you coming to Betty’s wedding? ---I’m not sure. I ______ go to Beijing on business that day.
The children all look forward to _______ the carnival next week.
You can trust him because he always ________.
She speaks English fluently _____ she were a native American.
The reason _______ he felt frustrated was ______ he lost his MP4.