Ⅰ.单句语法填空
1.The first robotic vacuum cleaner (design) for home use in the past years.
答案has been designed
2.Enough materials should be collected previously to (write).
答案writing
3.So far,you (learn) about two thousand new words.
答案have learned
4. (judge)from his appearance he seems to be rich.
答案Judging
5.In future articles we will come back and provide solutions some of the questions we have posed.
答案to
6.If I’m not (concern) about one thing or another,that means I have no choice but (relax).
答案concerned;to relax
7.Everyone agrees that we all need a (good) understanding of culture than the past.
答案better
