单项选择题
A.up B.off C.on
Progress has been （） in aeroplane design.A.doneB.madeC....
单项选择题Progress has been （） in aeroplane design.
A.done B.made C.produced
The question was so difficult that （） people could answ...
单项选择题The question was so difficult that （） people could answer it.
A.little B.afew C.few
She took her handkerchief out （） her pocket.A.fromB.ofC...
单项选择题She took her handkerchief out （） her pocket.
A.from B.of C.in
