The Internet is really ______ to us. We can easily find the information we need.
| A．safe | B．hard | C．boring | D．useful |
Lucy does well ______ math. You can ask her for help.
A. in B. at C. with
—Oh dear! I left my homework at home.
—I think you’ll have to ______ sorry to Miss Zhang.
A. say B. speak C. tell
Chen Wei is a ______. He can sing and write songs very well.
A. scientist B. musician C. pilot
I’ll take part in the boys’ ______ race this Friday.
A. 800 meters B. 800-meters C. 800-meter
The plane will arrive in Haikou in half ______ hour.
A. a B. an C. the