The boy wanted to play football in the street, but his parents told him ______.
A. not to B not to do C. not do it D. do not to
Keep away from the dog , _______it will bite you.
| A．and | B．so |
| C．or | D．but |
He made up his mind to devote all he could _____ his spoken English before going to college.
| A．to be practicing | B．practicing |
| C．practice | D．to practicing |
We live in a society ______ there is a great deal of debate about competition.
| A．where | B．which |
| C．when | D．that |
The fact ____ ancient Greek civilization had a great influence on Western culture is known to many people.
| A．whether | B．that |
| C．if | D．how |
---_______ the farmers discovered the entrance to the secret cave in the valley?
--- Totally by chance.
| A．When was it | B．How was it |
| C．How was it that | D．When was it that |