6. After a successful operation, Ronaldo has begun to do some exercise to ____ strength.
Taking weight-loss pills will __________ our health.
Does it ever __________ to you that they would be punished for being late?
The president, together with his bodyguard,__________ to the nuclear station __________ there was an accident 20 minutes ago.
A person, when he or she is young, can't read __________ many books.
The question which will be discussed next week has something __________ our salary.