In the USA, people on bikes must ____ a helmet.A. on B. put on C. wear
I like traditional Chinese food and traditional ____. A. dance B. dances C. dancing
My father’s birthday is ____ April. A. inB. onC. of
My grandpa ____ in Shanghai. A. liveB. livesC. lived
The two wheels ____ this bicycle were big. A. toB. ofC. off
The old men and women are ____ Buckingham Palace. A. inB. onC. at