Recently people have made great progress in using ______ power of nature to produce ______ electricity.
| A．a; the | B．/ ; / | C．the; / | D．a; an |
----- Try not to work yourself too hard. Take it easy.
----- Thanks._______
| A．So what? | B．No way. |
| C．What for ? | D．You too. |
Anyway, I can’t cheat him---it’s against all my __________.
| A．emotions | B．principles |
| C．regulations | D．patience |
Please do me a favor— _______ my friend Mr. Smith to Youth Theater at 7:30 tonight.
| A．to invite | B．inviting |
| C．invite | D．invited |
This is not my story, nor ______ the whole story. My story plays out differently.
| A．is there | B．there is | C．is it | D．it is |
_______ you may have, you should gather your courage to face the challenge.
| A．However a serious problem |
| B．What a serious problem |
| C．However serious a problem |
| D．What serious a problem |