I wonder ______ he is a young teacher or a student. Could you tell me?
| A．what | B．that | C．whether | D．if |
Staying up late _____ our health. We should go to bed early and get up early.
A. is good for
B. is useful for
C. is harmful to
We should _____ the rubbish when we go travelling.
A. take off B. turn off C. take away
I must ask my father to give up _____ . It’s bad for his health.
A. smoke B. smoking C. to smoke
Columbus ______ America in 1492. But he didn’t explore it.
A. looked forB. found out C. discovered
—Jim, get up right now, _____ you will be late for school.
—OK. Mom.
A. and B. or C. But