Ⅰ.单句语法填空
1.Guide dogs open up the lives of the blind or the (visual) impaired.
2.To make their travel more convenient,they decided to build an (arch) bridge.
3.One of the most important changes concerns the (invest) of pension contributions.
4.As is reported on TV,the fires are likely to (permanent) deforest the land.
5.Even gentle and artful (criticise) takes courage which I haven’t always had.
6.Many people made up their minds to take part in the (memory) activity on Sunday.
