Recently people have made great progress in using ____ power of nature to produce____ electricity.
| A．a; the | B．/; / | C．the; / | D．a; an |
After his brother left school, he got employed in a construction company, and ________ there ever since.
| A．worked | B．has worked | C．had worked | D．was worked |
---- You look tired.
---- Yeah, I ________ since 4 o’clock.
| A．had played | B．have been playing | C．am playing | D．have been played |
Believe it or not,_________ you have, I’m always on your side.
| A．what great difficulty | B．how great difficulty |
| C．no matter what great difficulty | D．however great difficulty |
The cruel parents ______ because of ______ they had done to the little girl.
| A．got punishment; which | B．got punished; what |
| C．got punishing; that | D．got to be punished; why |
__ I do not know what I ___________ without the suitcase you lent me.
__ Glad to have been of some help to you.
| A．would have done | B．would do | C．should have done | D．should do |