There’s no doubt that the past years have seen _______of the progress in economy of the country , as more and more people moved into new houses.

       A. impressions         B. views                       C. signs                  D. features

 There’s no doubt that I’ll _________ for the trick he played on me.

A. pay back      B. pay for         C. pay off          D. pay out

There’s no doubt _____enough concern must be paid to the problem of the stay­at­home children.

A. which       B. whether              C. that           D. what

There’s no doubt        2013 will bring more change when the world economy is still unclear.

A．what             B．that              C．how              D．where

There’s no doubt _________ our team will beat yours.