_____ is known to all, the age _______ children can go to school is seven.
| A．What; which | B．It; when | C．As; at which | D．Which; when |
Everyone has a responsibility to save _____ water, if future generations are to enjoy a similar standard of living to _____ we enjoy now.
| A．the; the one | B．不填; the one | C．the; one | D．不填; one |
---________, but the noise is really disturbing. I can’t sleep.
--- I’m sorry. I didn’t know you would mind.
| A．I hate to say this | B．I’d like to say this |
| C．You seem to be upset | D．I beg your pardon |
_______ progress it is, you can’t stop moving forward.
| A．Whatever great | B．However great |
| C．No matter how great | D．How great a |
All the employees except the manager _______ to work online at home.
| A．Encourages | B．encourage | C．is encouraged | D．are encouraged |
The boss said to the secretary “If you work well, you ______ have a rise.”
| A．must | B．ought | C．would | D．shall |