Those who have __________ floods and sandstorms knows the importance of environmental protection.
—What do you think of the movie ?—It’s fantastic . The only pity is that I the beginning .
There were signs here and there, _____ visitors to look out for ______ rocks.
She has ______ that doctor for three months.
Although ______ for many years, the two old sisters recognized each other at once.
He lay in bed, with his eyes ______ up at the ceiling and his fingers ______.