The teacher, with 6 girls of her class, ____ visiting a museum when it happened.
| A．was | B．were | C．has been | D．would be |
_______for the work, he went to sleep at ease.
| A．Well prepared | B．Preparing | C．Being prepared | D．Getting ready |
The monkey was so lucky that it just missed ______ .
| A．catching | B．to be caught | C．being caught | D．to catch |
Tom kept quiet about the accident _______lose his job.
| A．so as not to | B．so not as to | C．so as to not | D．not so as to |
There was a terrible noise _______ the sudden burst of light.
| A．followed | B．to be followed | C．following | D．being followed |
The sentence needs _______ once more.
| A．explained | B．explaining | C．being explained | D．to explain |