He is listening to the music _______ he is washing clothes.
—It's a fine day today. How about ________?—Sounds great!
Whenever you have a chance ________English,you should take it.
—I often have hamburgers for lunch.—You'd better not. It's bad for you ________too much junk food.
The new treatments ________by Norman Bethune helped a number of soldiers.
If prices rise too high, the government has to do something ________it.