This is the most important assignment facing American journalism — to make _____ clear to the reader the problems of the day. 

The CDs are on sale!Buy one and you will get___________completely for free．

—I think the whole class is going on a field trip next Friday.—I’m not sure. ____________ has paid the transportation fee. 

—Which of those electronic dictionaries do you like most?—     .They are expensive and of little use.

“There’s coffee and tea; you can have _______.” “Thanks.”