Although at present human egg cells and embryos needed for cloning research are difficult _____, Newspapers _________ evil leaders hoping to clone themselves.
To keep healthy,Professor Johnson _______ cycling as a regular form of exercise after he retired.
The heavy storm damaged a lot of fruit trees.The fruit prices have _______ immediately.
When you boil the milk you must _______ it carefully.
Eating too much fat can _______ heart diseases and cause high blood pressure.
We thought of selling this old furniture, but we have decided to _______ it.It might be valuable.