The story happened ________ the 19th century

oach, you should know clearly about thedirection ______ your team should develop.

–I hope to go to Beijing with you, if you please.–If so, your holiday arrangement must ______mine.

Old-fashioned phones matter when wireless networks break ____ in disasters.

Today we have too many choices of communication through advanced technology，but we seem ___________the joy of communicating face to face