----How long do you watch TV?
----I watch TV_______ every day.
| A．four an hour | B．an hour |
| C．for a hour | D．for an hour |
Life on Mars will be better than life on Earth __________many ways.
| A．on | B．in |
| C．at | D．for |
－_________I have a try on this pair of boot ? －Yes，you _________．
| A．Can；could | B．May；may |
| C．Can；might | D．May；could |
This is a big class，and _________of the students _________boys．
| A．two-third；are | B．second-there; is |
| C．two-thirds；are | D．two-three：is |
Spacecraft can travel ______the speed of light .
| A．for | B．on |
| C．in | D．at |
In 2100, people will by robots.
| A．cared for | B．be looked |
| C．be cared for | D．take care of |