___ we know, in a chemical change, energy cannot be created, ____.
| A．Which, nor can it be destoyed | B．As, neither it can be destroyed |
| C．As, neither is it able to be destoryrf | D．What, nor is destoryed |
【There’s a lot of water on the ground; the water pipe _____ be repaired.
| A．can | B．ought to | C．will | D．may |
"I ___ asleep all afternoon, so I didn’t hear the phone,"he _____ to me.
| A．lied; lay | B．lay; lied | C．lay; lay | D．lied; lied |
A lot of people don’t learn from their mistakes ______ they get hurt.
| A．whether | B．when | C．if | D．unless |
The Russian Railway has _______ the prices of tickets for long-distance trains.
| A．cut down | B．broken down | C．turned down | D．set down |
The winner of the race is tall and thin; he _______ be my friend, Mike, who is short and fat.
| A．might | B．mustn’t | C．can’t | D．should |