He set up in business____his own and was very successful.
C
「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。
Prices have recently risen in order to __________ the increased cost of raw materials.
_____enough time and money, the researchers would have been able to discover more in this field.