The threats to the health of astronauts in space are very different from __________ on earth.
| A．ones |
| B．that |
| C．it |
| D．those |
The CASS said the scores were based on corporate responsibility and financial reports,. But some people raised__________ about whether the information was reliable.
| A．problems | B．doubts | C．hands | D．heads |
I was so young. You__________ better than to rely on me
| A．should have known | B．should know | C．must know | D．must have known |
Out of__________ did the cat come and then it ran across the yard.
| A．somewhere | B．anywhere | C．everywhere | D．nowhere |
With films like Avatar proving__________ in cinemas, many technology experts believe 3D is now set to take over the home market,
| A．difficult | B．easy | C．common | D．popular |
I can’t accept the job. It is a huge task and don’t__________ me wrong,
| A．keep | B．make | C．get | D．let |