Rather than _____ on a crowded bus, he always perfers _____ a bike.
The company will be left in the _______ of the secretary when the manager is away.
It was last night_______ Mr. Brown came back to his hometown from Africa.
To be an excellent runner, you must be prepared to _______ much hard work.
It turned out that one of the children I thought a girl was _______ a boy.
With more forests being destroyed, humans have to _______ a lot from what they have done.