It’s not __ good idea to drive for four hours without _ break.
| A．a; a | B．a: the | C．the; a | D．the; |
The old scientist has made a great contribution the moon.
| A．in explore | B．to explore | C．explore | D．to exploring |
—What is the table made _______?
—Wood.
| A．by | B．in | C．of | D．from |
Many countries have a lot of rockets into space.
| A．sent | B．spent | C．flown | D．made |
—How can I learn English well?
—You will learn it well ________ you practice speaking it often.
| A．unless | B．as for | C．as soon as | D．as long as |
—Are you ready to leave, Helen?
—_________
—I was just asking if you’re ready to leave.
| A．Don’t be shy. | B．I beg your pardon? | C．I’m afraid not. | D．I hope so. |