“May I speak to your manager Mr Williams at five o’clocktonight”— “I’m sorry Mr Williams ________ to a conference by then”

This is the office _____ my parents are visiting now.

Don’t forget _____ your homework here tomorrow， Jim.

My aunt ________ be at home now， for she left for France this morning. She won’t be back ________ next month.

Thanks to the new bridge, people on that island no longer need to go to the city center ____ ferry.