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。
Thesmallmountainvillagewas（）bythesnowformorethanonemonth.
At______,photographyisachemicalprocess,duringwhichalight-sensitivematerialisalteredwhenexposedtolight.
John's score on the test is the highest in the class ; （）he last night.
I long to alleviate __________, but I cannot.
Modern____perhapscausesmoreproblemsthanitsolves.
