. They are teachers and don't realize the basic/primary rules and principles _____ to start and run a company.
| A．in which | B．for whom | C．with which | D．of whom |
. This dance is known _________ country music.
| A．performed by | B．performing with | C．to be performed to | D．being performed in |
-----Why did she spend so much time searching shop after shop only for a blouse?
-----Oh, she was very ________ about her clothes.
| A．pleased | B．particular | C．worried | D．curious |
Bad habits, _________ formed, are difficult to get rid of.
| A．and | B．or | C．once | D．but |
There will be a special prize for anybody who _________ a TV set in our shop
in the next two weeks.
| A．would order | B．orders | C．ordered | D．order |
There are altogether eleven books on the shelf, __________ five are mine.
| A．on which | B．in which | C．of which | D．from which |