The police tried _________ to break up the protest crowds.
| A．in vain | B．on vain |
| C．at vain | D．with vain |
Every means has been _________. No one is effective.
| A．trying out | B．tried in |
| C．tried on | D．tried out |
So desperate _________ that no one could help another, each _________ to save himself and his animals.
| A．was the situation ； was trying |
| B．the situation was; trying |
| C．the situation was ； was trying |
| D．was the situation; trying |
—Are there any English story books for us students in the library?—There are only a few, _________.
| A．if any | B．if have |
| C．if some | D．if has |
He describes everything in _________ order, which makes _________ excellent impression upon us.
| A．the; an | B．/; the |
| C．the; / | D．/; an |