Hearing his travelling _______, I knew that he was an _____ traveller.
| A．experiences; experienced | B．experience: experience |
| C．experiences; experiencing | D．experience; experienced |
Students shouldn’t be given so difficult a problem ______they can not work out.
| A．that | B．which | C．while | D．as |
____ is clear to us all, students should obey the school’s rules.
| A．As | B．What | C．Which | D．It |
______ time goes on,people ______ better housing and jobs.
| A．When;want | B．While;need | C．As;demand | D．Since;ask |
_____, we need to imporve the equipment in our factory.
| A．As it is | B．As it was | C．As it were | D．As it will be |
_____ writer, she is excellent, _____ teacher she is not very good.
| A．As; but as | B．As; and as | C．As a ; but as a | D．As a; and as a |