_______ was known to them all that William had broken his promise ______ he would give each of them a gift.
| A．As; Which | B．What; that |
| C．It; that | D．It; which |
Would you please __________ the paper for me and see if there are any obvious mistakes?
| A．look around |
| B．look into |
| C．look up |
| D．look through |
It rained heavily in the south,__________ serious flooding in several provinces.
| A．caused |
| B．having caused |
| C．causing |
| D．to cause |
According to the recent research, heavy coffee drinking and heart attack is not necessarily __________ and effect.
| A．reason |
| B．impact |
| C．fact |
| D．cause |
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 |