你想知道Tim 的妈妈在卫生间干什么,应该说:A.Where’s your mother, Tim?B.What’s your mother doing in the bathroom, Tim
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
An _____ invented this bicycle. A. Chinese B. American C. English
This old woman _____ have food. A.did B. didn’tC. don’t