Electrolysis(电解)is the process ______ electric current is passed through a substance to cause a chemical charge.
| A．which | B．whose | C．to which | D．by which |
— Hello, could I speak to Mr. Smith?— Sorry, wrong number. There isn’t __________ Mr. Smith here.
| A．不填 | B．a | C．the | D．one |
I know you don’t like __________ music very much. But what do you think of __________ music in the film we saw yesterday?
| A．不填;不填 | B．the; the | C．the; 不填 | D．不填; the |
Everywhere man has cut down __________ forests in order to grow crops, or to use __________ wood as fuel or as building material.
| A．the; the | B．the; 不填 | C．不填; the | D．不填; 不填 |
)According to __________ World Health Organization, health care plans are needed in all big cities to prevent __________ spread of AIDS.
| A．the; 不填 | B．the; the | C．a; a | D．不填; the |
For him __________ stage is just __________ means of making a living.
| A．a; a | B．the; a | C． the; the | D．a; the |