They use computers to keep the traffic smoothly.
We should consider the students’ request ______ the school library provide more books on popular science.
---The last one ______ pays the bill.--- Agreed.
Taobao is Asia’s largest retail(零售的) network platform, ______ people can buy and sell many kinds of things.
_____ the absence of the manager, we were unable to decide on the date of the celebration.
--Have you heard about Apple iPhone 4s?---Sure.It is very hot these days.I’m thinking about getting _______.