264. The invention of the coal-burning_______engine revolutionized industrial production in the 18th century and opened the way to the development of mechanized transport by rail and sea.
| A．vapour | B．steam | C．solar-energy__________ | D．atomic-energy |
To our surprise, the fashionable young lady ________ to be a thief．
| A．found out | B．proved out | C．put out | D．turned out |
I still remember the days___ I spent ______ with you in Beijing．
| A．when; staying | B．what; to stay |
| C．that; staying | D．during; to stay |
In the face of _____ failure, it is vital that we should keep up _____ good state of mind．
| A．a; / | B．/; a | C．the; / | D．/; the |
______ the Venice Film Festival, we are to include high-quality films, ______ who makes them.
| A．In defence of; regardless | B．In the defence of; regardless |
| C．In defence of; regardless of | D．In the defence of; regardless of |
______ itraintomorrow,wewouldhavetoputoffthesportsmeeting.
| A．Were | B．Should | C．Would | D．Will |