---How’s your tour around the North Lake? Is it beautiful?
---It __________ be, but it is now heavily polluted.
| A．will | B．would | C．should | D．must |
The question ______ last night was of great importance.
| A．discussed | B．discussing | C．to be discussed | D．discuss |
I heard a soft _______ at the door. When I looked up, I found it was Mary.
| A．noise | B．sound | C．voice | D．cry |
Last night he left his bike outside and had it_______.
| A．stealing | B．steal | C．stolen | D．to be stolen |
To keep ______, we must do more out-of-door exercises.
| A．well | B．fine | C．fit | D．health ‘ |
Thank you for_______ my trouble.
| A．talking | B．going | C．sharing | D．getting |