He set up in business（）his own and was very successful.
A、inC
「句意」他独自一人开始经商，并且做得很成功。
「难点」onone‘sown是个常用的介词词组，意为“独自”;ofone’sown表示“某人自己的(东西)”，如：Ihaveaflatofmyown.我自己有套房子。
U.S. News ____________ rankings of colleges since 1983. They are a very popular resource for students looking to apply to university campus.
Time_____,thecelebrationwillbeheldasscheduled.
Wecanhear（）fromthebackoftheroom.
Thesmallmountainvillagewas（）bythesnowformorethanonemonth.
He noticed the helicopter hovering over the field. Then to his astonishment, he saw a rope ladder _____ out and three men climbing down it.
