___modeling business is by no means easy to get into,good models will always be in demand
| A．While |
| B．Since |
| C．As |
| D．If |
–Did you go to the show last night?
–Sorry. No boy and girl in the area_________invited
| A．were | B．have been | C．has been | D．was |
— When did you first meet Tom?
— On May 2, ____, the first day I came to this city.
| A．or rather | B．at least | C．on the whole | D．in a word |
. The millions of calculations involved, had they been done by hand, _____ all practical value by the time they were finished.
| A．could lose | B．would have lost | C．might lose | D．ought to have lost |
_____ what he can do. He might get a job tomorrow. He might stay out of work for weeks.
| A．We didn’t know | B．He doesn’t know |
| C．There is no knowing | D．It was known that |
Students shouldn’t be given so difficult a problem_________they cannot work out.
| A．that | B．which | C．while | D．As |