________they visited the Science Museum，they showed great interest in everything they saw.
| A．The first time | B．For the first time | C．At first | D．At the first time |
.I should thank youthat you should thank me.
| A．because | B．rather than | C．for | D．as |
Don’t women. They are as important as men for the development of society.
| A．look up to | B．look out for | C．look down upon | D．look forward to |
No one can stop him,the boy is determined to do something.
| A．even if | B．once | C．now that | D．although |
Only after the woman had her own childhow difficult it was to be a mother.
| A．did she realize | B．she had realized | C．she realized | D．had she realized |
You mayyour teachers for help when you have problems.
| A．turn up | B．turn down | C．turn to | D．turn off |