I won’t tell the student the answer to the mathproblem until he on it for more thanan hour

Why does she look so unhappy? — Her mother doesn’t _______ of her going to study in the United States alone.

Is it high time that we _____ on the school building? —- Yes, it _____.

Your___________(speak) English is very good. –Thank you.

．Given that the patient smokes 50 cigarettes a day, it will be to assume there is some lung damage.