Never believe anything ________ other people have believed it.Use your own head.
| A．that | B．unless |
| C．because | D．once |
Most of us found _____ hard to finish the work in such a short time.
| A．it | B．that | C．which | D．this |
_______ he said was to the point..
| A．That | B．What | C．Which | D．As |
The boy ______ is talking to our foreign teacher is our monitor.
| A．which | B．whose | C．who | D．whom |
Drivers usually have _____ good sense of direction.
| A．a | B．an | C．the | D．/ |
Make sure that your computer room is 100%________of insects because they can really cause trouble to your machine.
| A．absent | B．rare | C．free | D．short |