Be polite ____ others!
—Have you ever ______ the Great Wall?
—Yes, I have. I went there on our last school trip.
been to
gone to
been in
—Look at the triangle on the right, if AC=3 , BC=4 , how long is AB?
—It’s ______.
five
seven
twelve
—Did you have fun watching the volleyball game?
—No. A tall man stood ______ me. I couldn’t see the players at all.
next to
across from
in front of
______ teenagers’ eyesight, experts advise them to stay away from electronic products.
Protect
To protect
Protecting
—“One tree can’t make a forest” is a famous saying.
—Yes. It shows us that team work plays a/an ______ role in our lives.
important
dangerous
harmful