There _____ be any difficulty in passing the oral test since you have practiced a lot in the school.
| A．mustn’t | B．shan’t | C．shouldn’t | D．needn’t |
____ 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 |
_____, the population of China is the largest in the world.
| A．It is known that | B．As is well known |
| C．Which is well known | D．We all know that |