When you come across new words in reading, it is not a good idea to_______ in a dictionary at once.
| A．make up them | B．look up them |
| C．make them up | D．look them up |
－_________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 |
I wonder ___________ from Beijing next week.
| A．whether will Tim return | B．whether Tim will return |
| C．if will Tim return | D．if Tim returns |