Whoever invented _______wheel is believed to have made ______most useful invention in _______history.
| A．a; the; / | B．the; the; / | C．the; a; / | D．a; a; the |
The school shop，__________ customers are mainly students, is closed for the holidays.
| A．which |
| B．whose |
| C．when |
| D．where |
English is a language shared by sever-al diverse cultures, each of __________ uses it some-what differently.
| A．which |
| B．what |
| C．them |
| D．those |
Between the two parts of the concert is an interval, __________ the audience can buy ice-cream.
| A．when |
| B．where |
| C．that |
| D．which |
Ted came for the weekend wearing only some shorts and a T-shirt, __________ is a stupid thing to do in such weather.
| A．this |
| B．that |
| C．what |
| D．which |
The film started to get boring, at __________ point I left the cinema accompanied by my twin sister.
| A．this |
| B．that |
| C．the |
| D．which |