Every four years athletes from all over the world _____the Olympic Games .
| A．join | B．attend | C．take part in | D．sit for |
—Have you finished your book report?
—Not yet. I couldn't________on it with so loud music next door last night.
| A．draw | B．devote | C．direct | D．concentrate |
Once we have________some knowledge, things do not become more difficult, but comprehensible.
| A．required | B．acquired | C．inquired | D．inspired |
The chief editor demanded that the article ________immediately.
| A．must be submitted | B．would be submitted | C．submits | D．be submitted |
Tom is a promising student. I am sure that with his________effort, he will make a very successful scientist.
| A．usual | B．constant | C．content | D．normal |
We are hoping that these measures taken by the local government will help________things a bit.
| A．sweep up | B．speed up | C．make up | D．save up |