单项选择题
A.on B.over C.in D.of
Are you going to keep me()all day longA.to wailB.waitC....
单项选择题Are you going to keep me()all day long
A.to wail B.wait C.waiting D waited
()ballpoint pen was invented by()Hungarian refugee nam...
单项选择题()ballpoint pen was invented by()Hungarian refugee named Lazlo Biro.
A.A;a B.The;a C.A; the D.The; the