A serious study of physics is impossible________some knowledge of mathematics.
一I’d like to take a long holiday. 一. We are too busy!
—Peter, let’s check what we still have left. —Well, _____ is no use evaluating the total loss before the typhoon leaves.
In the factory, the helmets the workers wore varied _____ color according to their different posts.
The medicine bought at a high price turned out to have no _____.
Please tell me how global warming _____. I am still in the dark.