When he the door, he found his keys were nowhere.
| A．would open | B．opened | C．had opened | D．was to open |
__________，there are 50，000 visitors to the exhibitionevery day.
| A．At average | B．By average | C．On average | D．To average |
The custom, practice, idea and belief have __________ from generation to generation.
| A．passed down |
| B．been passed down |
| C．been carried forward |
| D．to passed on |
__________ meet her at the railway station, he had toget up early.
| A．In order that | B．In order to | C．So that | D．So as to |
The open-air celebration has been put off __________the bad weather.
| A．in case of | B．in spite of | C．instead of | D．because of |
The joke told by Tom made us __________，so ourmaths teacher couldn't make himself __________.
| A．laugh； hearing |
| B．laugh； heard |
| C．laughing ； hear |
| D．laughed ； to be heard |