Social attention should be paid our earth from .
| A． to prevent; being polluted | B． to preventing; polluted |
| C． to prevent; polluting | D． to preventing; being polluted |
I feel that it was time for me to ____.
| A．take actions | B．take an action | C．take the action | D．take action |
They their side of the field very well.
| A．defended | B．protected |
| C．keep | D．prevent |
Her father gave her the ___ of going on to college or starting to work.
| A．chance | B．opportunity |
| C．alternative | D．possibility |
He soon found himself his new co-workers.
| A．in harmony of | B．in the harmony of |
| C．in harmony with | D．in the harmony with |
is a good chance that I'I1 finish the work tomorrow.
| A．It | B．There | C．This | D．That |