I'm amazed that Tom is only 25. I thought he was_______, for he seems to be in his thirties.
Mary noticed ________ with the English way of life.
---________is the weather like in America in winter? ---It’s snowy.
Its population is almost ________ of the world’s population.
At eight o’clock last night Alice _________ with her family happily in Hongkong.
John does important research _______ the best ways to help the old.