Please come to （） your ticket at the booking office.

单项选择题She didn’t leave for the airport （） you came.

A.unless
B.until
C.if

单项选择题That book gives a very vivid （） of that city.

A.picture
B.photo
C.view

单项选择题The police knew the （） of the accident.

A.cause
B.reason
C.result

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