-----Where ____ you put the ruler? I can't see it anywhere. -----I put it right here. But now it is ____.
—Have you finished your book report? —Not yet. I couldn't________on it with so loud music next door last night.
Once we have________some knowledge, things do not become more difficult, but comprehensible.
The chief editor demanded that the article ________immediately.
Tom is a promising student. I am sure that with his________effort, he will make a very successful scientist.
We are hoping that these measures taken by the local government will help________things a bit.