Many experts believe that teachers' development is ______ the key to better education lies.
| A．that | B．what |
| C．where | D．which |
So far as I am concerned, he is a determined man and on no account ______ die easily.
| A．he says | B．he does say | C．says he | D．does he say |
There are several people who have called _______ the advertisement we placed in yesterday’s newspaper.
| A．in favour of | B．in response to | C．in honour of | D．in return for |
Don’t take ______ for granted that he will agree with you on the subject.
| A．this | B．that | C．it | D．Which |
In this country it is required that anyone who wants to settle here ______ to pass this kind of test.
| A．has | B．must have | C．have | D．will have |
You will find the game is not so difficult to play ______ you understand its rules.
| A．until | B．since | C．before | D．once |