A good student is good at _______ what the teacher says at once when hearing something important in class .
Scientists have found it seems _______animals and humans are much alike than we thought.
Parents should see to it _______ their children form the habit of brushing their teeth every day.
The computer system _______suddenly while he was searching for information on the Internet.
Whatfun it is to walk alone withfull moon hanging in the sky.
I insisted __________ to see a doctor, but he insisted nothing __________ wrong with him.