山东住院医师急诊科内分泌科单项选择题每日一练(2016.06.15)

单项选择题
Our company has 30years’ experience（）the machinery line.
A.on
B.in
C.about
D.of
单项选择题
The consignment certainly does not match the samples（）you sent us last month.
A.these
B.---
C.what
D.when
单项选择题
When yon（）an agent，it is usual to（）the appointment in writing.
A.appoint，make
B.want，make
C.need，make
D.need，do
单项选择题
Please let us know what（）are involved and the time（）for delivery.
A.formalities，taken
B.procedures，need
C.business，taken
D.process，needed
单项选择题
I appreciate（）the opportunity to visit your factory.
A.having been given
B.to have been given
C.having given
D.to have given