(大连市高三双基测试卷)Could you tell us ______ happens when one student in class expresses a personal opinion _______ maybe offends other students?
The other day I bought a vase, _______ was very reasonable.
We went through a period _____ communications were very difficult in the rural areas.
My documents are always ______ out according to the contents (内容) and dates so that I have no trouble in finding them when they ______.
_______ English, the disabled boy could also speak fluent German and French.
We _____ the sunshine in Sanya now if it were not for the delay of our flight.