----Why can’t I smoke here?
----At no time_____in the meeting room.
| A．is smoking permitted | B．smoking is permitted |
| C．smoking is it permitted | D．does smoking permit |
He had his camera ready ____he saw something that would make a good picture．
| A．even if | B．if only | C．in case | D．so that |
Look over there--- there’s a very long，winding path _____up to the house．
| A．leading | B．leads | C．led | D．to lead |
I'm afraid he’s more of a talker than a doer, which is ____ he never finishes anything．
| A．that | B．when | C．where | D．why |
They are broadening the bridge to ____ the flow of traffic．
| A．put off | B．speed up | C．turn on | D．work out |
The two girls are so alike that strangers find ___ difficult to tell one from the other．
| A．it | B．them | C．her | D．that |