In fact fuels we burn and plant food we eat ______ their chemical energy in the form of heat.
| A．give in | B．give off | C．give away | D．give up |
Not until all the fish died in the river ________ how serious the pollution was.
| A．did the villagers realize | B．the villagers realized |
| C．the villagers did realize | D．didn’t the villagers realize |
I finally got the job I dreamed about. Never in all my life ________ so happy!
| A．did I feel | B．I felt |
| C．I had felt | D．had I felt |
The old couple have been married for 40 years and never once ________ with each other.
| A．they had quarrelled | B．they have quarrelled |
| C．have they quarrelled | D．had they quarreled |
Maybe you have been to many countries, but nowhere else ________ such a beautiful place.
| A．can you find | B．you could find |
| C．you can find | D．could you find |
________ is no good ________ over spilt milk.
| A．This; crying | B．It; to cry |
| C．It; crying | D．That; to cry |