Not only he but also his friends_______ eager to help those who lost their homes in the earthquake.
| A．was | B．were | C．is | D．are |
The light bulb ______ by Edison in the middle of the 1780s.
| A．is invented | B．was invented | C．invented | D．invent |
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 |