-What are you doing?-I’m .A.cook B.cooking C.where
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
The man invented this bicycle ____ 1839. A. in B.onC. at