单项选择题
A.how much B.how many C.about D.what
He has been a Captain（）1992.A.afterB.sinceC.beforeD.for
单项选择题He has been a Captain（）1992.
A.after B.since C.before D.for
There are still（）charts to be corrected.A.fewB.a fewC.l...
单项选择题There are still（）charts to be corrected.
A.few B.a few C.little D.a little
The vessel is at a speed of 16（）.A.kilometers per hourB...
单项选择题The vessel is at a speed of 16（）.
A.kilometers per hour B.miles per hour C.revolution per minute D.meters per hour
