The police knew the （） of the accident.

单项选择题The pilot turned engine （） and is ready to take off.

A.up
B.off
C.on

单项选择题Progress has been （） in aeroplane design.

A.done
B.made
C.produced

单项选择题The question was so difficult that （） people could answer it.

A.little
B.afew
C.few

单项选择题She took her handkerchief out （） her pocket.

A.from
B.of
C.in

单项选择题He is excited （） the good news.

A.with
B.for
C.about