1．Solar panels can only ________ (操作)in sunlight.
2．The meeting discussed the fair ________ (分配)of income and wealth.
3．Students are encouraged to ________ (参加)in the running of the college.
4．You can ________ (调整)this desk to the height of any child.
5．Now I have the great ________ (特权) of introducing our speaker from Japan.
6．Study harder from now on. ________ (否则)，you will fall behind.
7．As an interpreter, her sister did much ________ (志愿的)work during the Asian Games.
8．If you are not satisfied with your ________ (购买的东西)，we will give a full refund.
9．This ________ (偏僻的)village is so out of the way that mail comes only once a week.
10．Jack and Kim celebrated their twentieth wedding ________ (周年纪念日)in January.
