小试牛刀：
7. Was it in the shop ________ sold children's clothing that you lost your wallet?
A. / B. where C. that D. when
8. Thank you for the difficulty ________ you have had painting the house.
A. when B. / C. why D. where
9. Is there anyone around the factory ________ knows how to operate the computer?
A. who B. which C. where D. in which
10. The managers discussed the plan ________ they would like to see ________ the next year.
A. that;carried out B. who;carried out C. which;carry out D. that;carrying out
11. She was much disappointed to see the beautiful cloth ________ she had made ________ with lots of spots.
A. which;cover B. that;covered C. /;covering D. where;covering
12. Lincoln, ________ life was once hard, were elected President of American.
A. for whom B. who C. to whom D. /