My cousin___________ about an hour___________ her homework.
| A．spend, do | B．spends, do |
| C．spend, doing | D．spends, doing |
John does important research _______ the best ways to help the old.
| A．finds | B．finds | C．found | D．to find out |
Many wild animals don’t have a safe place to live, ___________people are taking away their land and forests.
| A．when | B．while | C．because | D．and |
We stayed there and watched the opera ______ an hour.
| A．in | B．for | C．at | D．on |
Look , this year the player are training _________.
| A．exciting | B．busy | C．careful | D．carefully |
The library is __________ than the classroom.
| A．tall | B．much bigger | C．the newest | D．wide |