未知题型 听力原文：Q: Which floor is the flat on?(15)A.On the first floor.B.On the second floor.C.On the third floor.D.On the fourth floor.

未知题型 在交际谈话中，（）人不习惯长久注视对方。

未知题型 In order to ensure smooth and clear transitions between points, you can use '______'.A.in additionB.in my opinionC.in this section I shall discuss xD.Both B and C