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。
She was once a young country wife with chickens in the backyard and a view of _______mountains behind the apple orchard.
The back garden of our house contains a lawn ，____very pleasant to sit on in summer.
Theschoolisgoingthe________miletocreatethenextgenerationofsportingstarsthankstoitsuniquedevelopmentprogram.
_____, he can now only watch it on TV at home.