It is so cold that you can't go outsidefully covered in thick clothes.
| A． | if | B． | unless | C． | once | D． | when |
They suggested that the professor ______ just now ______ chairman of the meeting.
| A．referring to; was made | B．referring to; be made |
| C．referred to; be made | D．referred to; was made |
Only when he returned _________ that the war had ended and the army had come back.
| A．we tell | B．we told | C．did we tell | D．were we told |
--- Can you introduce me a high quality machine?
--- My pleasure. _______ well even on wet roads, this kind of car is very popular.
| A．Handled | B．To handle | C．Handling | D．Being handled |
September 8th，1931 is a special day，________, I think，that will be remembered by the Chinese forever.
| A．one | B．it | C．which | D．that |
I ______ him in time, otherwise he would have fallen off the bike.
| A．had supported | B．supported | C．have supported | D．support |