Through thorough investigation, Dr. John Snow was finally able to prove that the outbreak of Cholera _____ people’s drinking of polluted water.
| A．was close linked with | B．closely linked to |
| C．was close connected with | D．was closely linked with |
—No one can achieve anything of real significance he works very hard.
— I got it, Dad. I’ll study hard from now on.
| A．because | B．if | C．unless | D．when |
It was his ability to deal with unexpected problems rather than his family background drew the manager’s attention.
| A．where | B．which | C．what | D．that |
—I just got laid off. An awful business, you know.
— So are you all right?
| A．That’s a shame. |
| B．It doesn’t hurt to ask. |
| C．Is it as bad as that? |
| D．Believe in yourself! |
We need some more facts and figures we take the final decision.
| A．since | B．after | C．before | D．until |
Only you step into society can you learn practical things.
| A．while | B．that | C．when | D．as |