_____ all the demands had been refused _____ to go on strike.
| A．Only; did the workers decide | B．Not until; the workers decided |
| C．Not until; did the workers decide | D．Only after; the workers decided |
33. He hasn’t decided _____ he will go abroad next year.
| A．whether | B．when |
| C．where | D．why |
The old man turned his business over to his younger son, ________made his elder son discouraged.
| A．who | B．what |
| C．that | D．which |
Stand _____ you are, and I will come and help you.
| A．while | B．where |
| C．which | D．what |
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 |