The red-crowned crane is one of _______ in the world.
| A．a rare animal |
| B．the rare animal |
| C．the rarest animals |
| D．the rarest |
The rich man ________ much food________ the poor families during the hard time.
| A．provides, to | B．provides, with | C．provided, with | D．provided, for |
I’m sorry I’m late for work _______ the heavy traffic this morning.
| A．because | B．because of | C．if | D．there’s |
----The number of the tigers is getting __________. ---- I agree _______ you.
| A．more and more , to | B．smaller and smaller, to |
| C．smaller and smaller, with | D．more and more ,with |
The reserve is an important ______ area for the rare red-crowned cranes.
| A．live | B．alive | C．living | D．life |