1.occur 替換think of

　　Suddenly I had an idea that someone had broken into my house.

　　An idea occurred to me that someone had broken into my house.

　　It occurred to me that someone had broken into my house.

　　2.devote替換spend

　　He spends all his spare time in reading.

　　He devotes all his spare time to reading.

　　3.seek替換want / look for

　　They sought (wanted) to hide themselves behind the trees.

　　4.average 替換ordinary

　　I’m an average (ordinary) student.

　　5.but替換very

　　The film we saw last night was very interesting.

　　The film we saw last night was nothing but interesting.

　　The film we saw last night was anything but boring.

　　6.seat 替換sit

　　On his way to school, he found an old lady seated (sitting) by the road, looking worried.

　　7.suppose 替換should

　　He is supposed to (should) have driven more slowly.

　　8.appreciate 替換thank

　　Thank you very much for your help.

　　We appreciate your help very much. / Your help is much appreciated.

　　9.the case替換 true

　　I don’t think it is the case(true).