I didn’t realize putting on a play _________ so much work.
| A．included | B．have | C．involved | D．need |
Under no circumstances _______ the difficulties when they were on an expedition to the Antarctic．
| A．they gave way to | B．did they give way to |
| C．they had given way to | D．had they given way to |
In the city, I saw so grand a National Day celebration _______ I never dreamed of．
| A．which | B．as | C．that | D．when |
If only I _______ more confidence in the English speech contest held last week!
| A．would have | B．had | C．had had | D．have |
According to the school rules, no child _______ be allowed out of the school during the day, unless accompanied by an adult．
| A．will | B．would | C．might | D．shall |
It was not until 1911, _______ the first vitamin was identified, _______ people realized the importance of it．
| A．when; which | B．when; that | C．that; which | D．that; that |