Once harm is _______ to the eco-system, all species will ________, including man himself.
| A．made; be in danger | B．done; be dangerous |
| C．caused; be endangered | D．done; be in danger |
I don’t know if he ____, but if he ____ I will let you know.
| A．comes; comes | B．will come; will come | C．comes; will come | D．will come; comes |
One of the men gave his opinion ____ what the book said was right.
| A．that | B．what | C．whether | D．which |
--It’s raining heavily, isn’t it?
--Yes, ______ yesterday.
| A．so is it | B．so it was | C．so was it | D．so it is |
I can’t go to the cinema with you tonight as I have so much work to do. ____, it is raining really heavily.
| A．Instead | B．Plus | C．Although | D．However |
The most important thing about ancient civilizations is ____ part that they played in ____ history.
| A．不填; 不填 | B．a; the | C．the; the | D．the; 不填 |