An American father made pretty dresses for his daughter out of his old shirts．（wife）
The oceans are polluted by plastic waste． （heavy）
Chinese scientists have successfully cloned （克隆）two ．They are named Zhong Zhong and HuaHua． （monkey）
Children will be in danger in a swimming pool if their parents don't take good care of ．（they）
The second﹣hand car is much （cheap） than the new one．