At a beach or a swimming pool a lifeguard is a person who is responsible for __________ other swimmers and protecting them from accidents.
I don’t mind her criticizing me,but___is how she does it that I object to.
Experts have been warning___of the health risks caused by passive smoking.
After graduation she reached a point in her careershe needed to decide what to do.
—I have got a headache.—No wonder.You___in front of that computer too long.
The melon the Smiths served at dinner would have tastedif it had been put in the fridge for a little while.