There are two buildings, _______ stands nearly a hundred feet high.
This kind of desk can be ______ to the height you need.
Mother was in the kitchen ______ lunch while I was ______ the coming exam.
—What do you admire the spaceman ______? —His bravery to travel around the earth ______ a spaceship all alone.
Are you ______ your son has difficulty in studying at school?
The number of deaths from heart disease will be reduced greatly if people ______ to eat more fruit and vegetables.