三个小问题答对有奖20.单选题：Since the early nineties,the trend in most b

三个小问题答对有奖
20.单选题：Since the early nineties,the trend in most bussiness has been toward on-demand,always-available products and services that suit the customer's _________ rather than the company's.
A.convenience
B.availability
C.benefit
D.suitability
21.单选题：There has been a ________ lack of communication between the union and the management.
A.regretful
B.regrettable
C.regretted
D.regretting
22.单选题：________ the financial means to remain independent,Thomas Edison was compelled to seek employment as a night telegraph operator.
A.He was deprived of
B.Although he was deprived of
C.Deprived of
D.That he was deprived of