阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

Many scientists believe our love of sugar may actually be an 【小题1】(addict). When we eat or drink sugary foods, the sugar enters our blood and affects parts of our brain 【小题2】 make us feel good. Then the good feeling goes away, 【小题3】 (leave) us wanting more. All tasty foods do this, but sugar has a 【小题4】(particular) strong effect. In this way,【小题5】is in fact an addictive drug, one that doctors recommend we all cut down on.

“It seems like every time I study an illness and trace a path to the first cause, I find my way back to sugar,” says scientist Richard Johnson. One-third of adults worldwide have high blood pressure, and up 【小题6】 347 million have diabetes(糖尿病). Why? “Sugar, we believe, is one of the 【小题7】 (reason), if not the major one,” says Johnson.

Our bodies 【小题8】 (design) to survive on very little sugar. Early humans often had very little food. In this way, we had energy stored for when there was no food. 【小题9】 today, most people have more than enough. So the very thing that once 【小题10】 (save) us may now be killing us.