Bill was doing a lot of physical exercise to build up his_______.
| A．ability | B．force | C．strength | D．mind |
It’s his own ______ that he failed in yesterday’s interview.
| A．fault | B．mistake |
| C．duty | D．error |
----- What do you think of my paper?
----- The _______ part is well written but the latter is just so-so.
| A．primary | B．former |
| C．late | D．latter |
I _______ use a clock to wake me up because at six o’clock every morning the train comes by my house.
| A．couldn’t | B．mustn’t |
| C．shouldn’t | D．needn’t |
A number of tests have been conducted to _______ that these drugs have no side effects.
| A．find out | B．look for |
| C．make sure | D．work out |
Every year, typhoons and losses ______ lead to are frightening though measures have been taken.
| A．which | B．that | C．they | D．ones |