We should encourage the planting of new trees and ______our__________ woodland.
| A．keep…present | B．protect …existed | C．save…present | D．preserve…existing |
I wonder how long it will take you_____ such a hard task within so little time.
| A．complete | B．to complete | C．completing | D．completed |
Tom was absent from school this morning, because sometimes he was a little weak and could ______ill .
| A．take | B．set | C．catch | D．fall |
. Will you pass me the dictionary _____ the cover is dark blue?
| A．its | B．which | C．whose | D．of which |
_____the girl could rush out of the house, the roof fell upon her.
| A．When | B．While | C．Before | D．As |
The company wouldn’t decide to_________ dozens of its employees in spite of the sharp drop in sales.
| A．lay off | B．lay down | C．lay out | D．lay aside |