Now their talks have reached a key stage________one side must give in to the other.
| A．which | B．that | C．where | D．how |
He’s only too ready to help others, seldom, _____ refusing them when they turn to him.
| A．if ever | B．if never | C．if not | D．if any |
______, the conference began.
| A．The candidates having taken their seats |
| B．The candidates had taken their seats |
| C．Taken their seats |
| D．Taking their seats |
--- Can I smoke here?
--- Sorry. On no condition_____ in the library.
| A．smoking permits; | B．smoking is permitted |
| C．does smoking permit | D．is smoking permitted |
So loudly _____ that ______ hear her clearly.
| A．did she speak; could everyone | B．did she speak; everyone could |
| C．she spoke; could everyone | D．she spoke; everyone could |
_______, she is quite modest.
| A．As she is an experienced teacher | B．An experienced teacher as she is |
| C．Experienced teacher as she is | D．Experienced teacher although she is |