1.occur 替换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.
He spends all his spare time in reading.
He devotes all his spare time to reading.
3.seek替换want / look for
They sought (wanted) to hide themselves behind the trees.
I’m an average (ordinary) student.
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.
On his way to school, he found an old lady seated (sitting) by the road,
He is supposed to (should) have driven more slowly.
Thank you very much for your help.
We appreciate your help very much. / Your help is much appreciated.