According to my grandma, it is a good idea to drink chicken soup when you have a cold. _____, scientists agree with her.
| A．Sooner or later | B．For example |
| C．To be honest | D．Believe it or not |
______stopping polluting the earth______hope to live in a better environment．
| A．Only to；we Call | B．Only to；can we | C．Only by；can we | D．Only by；we can |
You______be tired—you've only been working for an hour．
| A．must not | B．won't | C．can't | D．may not |
Father______for London on business upon my arrival，so I didn't see him．
| A．has left | B．left | C．was leaving | D．had left |
The success of this project______everyone making an effort．
| A．relies on | B．cares for | C．reminds of | D．suffers from |
When______，the museum will be open to the public next year．
| A．completed | B．completing | C．being completed | D．to be completed |