1.The old people are often looked after by them.
2.什么叫the his made?初步理解为：He was made at night by his work.
3.The school rules should not be broken off by the students.
4.He is seen to play basketball by me.
5.Some gifts were brought to us by Tom.
6.这句话也有问题,什么是wong?什么叫the children's students?初步理解为：The children's students are always wonged(wong的过去式,其实我觉得这个单词应该是worry,可能是楼主打错了)by there parents.
7.A sarf was got to her by Ann.
8.A little English can be spoken by us.
9.Traffic rules must be obeyed by people.
10.The apple must be cut into pieces by boys.
11.He is laughed at by all ray classmates.
12.The classroom should be cleaned up by them.
13.Some mice were cought by her.
14.A swit was worn by Tom.
15.Some advice is gared to them by Many.(也不清楚你这句话到底是想表达个什么.)
数学题：设高（即渠深）为x,列出等式为：（x+2+x+0.2)x/2=1.6,化简该式得：10x^2+11x-16=0解出x来即可
注意：x的值不能为0或负数