(2012年浙江卷，2)The development of industry has been ________ gradual process throughout ________human existence，from stone tools to modern technology.
| A．不填；the |
| B．the；a |
| C．a；不填 |
| D．a；a |
Twenty students want to attend the class that aims to teach________to read fast.(2011·辽宁)
| A．what | B．who | C．how | D．why |
It sounds like something is wrong with the car's engine.________，we'd better take it to the garage immediately.(2011·江苏)
| A．Otherwise | B．If not |
| C．But for that | D．If so |
It is not how much we do but how much love we put into what we do ________ benefits our work most.(2011·陕西)
| A．who | B．which | C．that | D．what |
It is still under discussion ________the old bus station should be replaced with a modern hotel or not.(2011·重庆)
| A．whether | B．when |
| C．which | D．where |
He is only too ready to help others，seldom，________refusing them when they turn
to him.
| A．if never | B．if ever | C．if not | D．if no |