finish the second sentences so that it has the same meaning as the fist:
1,kepping the enviroment clean is very iportant
-it's.......................................................................
2.they will show the time machine to the public when they finish it
-the time machine.......................................
3,he was delighted to receive his aunt's letter
-he was delighted that his.........................................
4,old car tires are recycled to make shoes and sandals
-people............................................................
5,i'm ery sad that i wasn't accepted in that group
-i'm very sad not......................................
6, Van keeps forgetting his homework
-Van is...................................................
7,i would like you to help me to put the chairs away
-do you mind..........................................
8,please don't make any noise,i'm very tired
-i'd rather........................................
9,having a vacation abroad is very interesting
-it is...........................................................
10,the water was so cold that the children couldn't swim im it
-the water wasn't..............................................