In the botanic garden we can find a（n）______of plants that range from tall trees to small flowers.
A．spec ies |
B．group | C．amount | D．variety |
The officer commanded that the supplies of food and clothes ______ to the flooded area.
| A．should send | B．be sent |
| C．were sent | D．would send |
According to ______ survey，there're more and more young people who go for a walk at ______ dusk instead of sitting in front of the computer.
| A．a；the | B．a；不填 |
| C．the；the | D．不填；不填 |
_________． according to the instructions，the medicine will work for your headache．
| A．To take | B．Taking |
| C．Taken | D．Take |
As Mrs Roosevelt put_________ ，I'd rather light a candle than complain about the darkness．
| A．it | B．that |
| C．this | D．them |
We can go on Tuesday or Friday， __________you prefer.
| A．whenever | B．however |
| C．whatever | D．whichever |