英语改错,

英语改错,
也可能没有错误.
1 many American tea kettles whistle when the water contained inside starts to boil .
我认为contained和inside可以去掉一个,
2 many mountain animals have hooves more developed than similar animals living on land
3 price of a new car run anywhere from around S11500 to S1 milllon or more
4 study sickness while you are well.这是祈使句吗,怎么改?
5 the kitchens of many dormitaries are common area and can be used by all residents of the dormitary
6 Pilot whales have big,round,bolbous head and are members of the dolphin family
7 this waxy ,pearly solid is chiefly cosmetic and was once used as a fuel
8 also known for orcinus orca,the killer whale is a predatory member of the dolphin family .
还有2个
9 Aluminum is the most abundant metal in the crust of Earth ,but the nonmetals oxygen and silicon are more still abundant
10 Anthropologists agree that our primitive ancestors who inhabited the tropics probably have a natural protection against the sun .