Just like spoken language, body language from culture to culture,
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.
What fun it is to walk alone with full moon hanging in the sky.
I insisted __________ to see a doctor, but he insisted nothing __________ wrong with him.
He studied hard, __________ the exam.