大学英语：语法：冠词的顺序问题

　2. 语法：冠词的顺序问题

　　a strict diet 试比较 too strict a diet (很严格的饮食)

　　a great quantity of books 试比较 as great a quantity of books (大量的书)

　　3. Much less food than usual 此处的much放在比较级less前起到一个强调的作用;less是little的比较级

　　4. What(what在主语从句中做realize的宾语，指事，所以用what) they do not realize， however， is that carbohydrates are our bodies'main source of energy.

　　5. As a result， they try to avoid eating(avoid这个动词后如果加动词应该用动词的ing形式) these foods， and consequently， they become weaker and less(less是little的比较级) healthy.

　　6. They begin to have difficulty sleeping(省略介词in) properly and start to suffer from radical mood changes.