. — They suggest the number of cars should be limited to stop air pollution. — ____, the idea is not practical.
He is the first person you can think of ______, for he is always willing to ______ is in trouble.
Every means ______ prevent the water from ______.
Henry was _____ struggling at sea by a British ship, _____ he was able to survive the accident.
The girl ______ on the ground ______ to me that she had ______ the purse on the desk.
How did it come about that you failed to ______ in time for the meeting yesterday?