There is never enough time to do everything, ______ there is always enough time to do the most important thing.
| A．and | B．but | C．or | D．so |
The singing group was so well received that the size of audience, ___ we had expected, was well over one hundred.
| A．whom | B．who | C．as | D．what |
Mr. Zhang said that he would be punctual for the appointment, _______ he were late?
| A．but what if | B．and what about | C．so what | D．how about |
I am willing to do whatever my country requires _______ me?
| A．on | B．for | C．of | D．to |
Compared with the nervousness of driving in the rain or snow, it is ______ to sit in a train without any worry of bad weather.
| A．more tired | B．less tiring | C．less tired | D．even more tiring |
Many experts believe that teachers’ development is _______ the key to better education lies.
| A．that | B．what | C．where | D．which |