1、There was sixty books on the desk,____are chinese,____are

1、There was sixty books on the desk,____are chinese,____are english.
a.some,others b.some ,the others c.some ,other d.some,the other
2、_____ a parents' meeting next friday on the playground.
a.it will be b.it will have c.there will be d.there will have
3.can you give me ___about learning english?
a.an advice b.any advices c.any advice d.some advice
4.i saw some people___on the square.
a.dance b.dancing c.to dance
5.by the time i got home,i realized i ____my keys in my office
a.leave b.left c.have left d.had left
6.during the past thirty years,great changes____in my home town.
a.took place b.had taken place c.has taken place d.have taken place
7.it took tom only ten minutes___in working out that difficult math problem.