They knew nothing about ______ he was a thief.
| A．that | B．which |
| C．what | D．the fact that |
The following day she didn’t go to the club. __________, she walked her dog in a park nearby.
| A．Therefore | B．However | C．Instead | D．Besides |
In the botanical garden we can find a(n) __________ of plants that range from tall trees to small flowers.
| A．species | B．group | C．amount | D．variety |
Many animals and plants, which couldn’t __________ the sudden change of the climate, died out. Dinosaurs are one such example.
| A．add to | B．turn to | C．adapt to | D．lead to |
Letterboxes are much more __________ in the UK than in the US, where most people have a mailbox instead.
| A．common | B．normal | C．ordinary | D．usual |
Tom has always thought of himself as a good cook and never fails to __________ everyone of it.
| A．remember | B．introduce |
| C．remind | D．interrupt |