____makes some people appear astonishingly youthful while others seem much older than their actual age?
| A．What it is | B．What is it that |
| C．What it is that | D．Why it is what |
Tom thinks _____ important to get to know his students well.
| A．that | B．it | C．this | D．him |
_____ is known to us all _____ Lu Xun is famous for his great works_____ a great writer.
| A．It; that; for | B．It; that; as |
| C．As; / ; for | D．As; that; as |
When he left _____ college, he got a job as _____ reporter in a newspaper office.
| A．/; a | B．/; the | C．a; the | D．the ;the |
We _____ a word unless she asks us_____.
| A．didn’t dare say; to | B．don’t dare to say; to |
| C．dared not say; to say | D．dare not to say; to say |
It was _____ that I didn’t like to leave my room.
| A．such cold | B．such a cold day |
| C．so cold day | D．too cold a day |