In the new century, we still should _____ primary importance to the development of economy.
| A．perform | B．attack | C．seek | D．attach |
Although the entrance to the cave was very narrow, those visitors managed to________through it.
| A．press | B．squeeze | C．break | D．cut |
I don't think Tom's remarks are________；he is not supposed to say so.
| A．in place | B．in peace |
| C．in surprise | D．in trouble |
So suddenly ________that the animals in the zoo looked very frightened during the total solar eclipse (日全食)．
| A．did the sky turn dark | B．the sky did turn dark |
| C．turned the sky dark | D．was the sky turned dark |
—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 |