单项选择题
There has been a great increase in retail sales , （）﹖
A.does there B.isn't there C.hasn't there D.isn't it
单项选择题 The professor said he could talk on （）interested the audience．
单项选择题 You （）him so closely; you should have kept your distance．
单项选择题 It （）quite a few years （）the accused was declared innocent and set free．
