请根据括号中的中文提示、英文释义或句意，写出句中所缺单词，使句子通顺。

小题1:The girl is very healthy because she ___________(很少) eats junk food and exercises more.

小题2:The bus is so ___________(拥挤的) that we have to wait for the next one. How unlucky!

小题3:Zhou Kehua’s girl friend will be put in __________for five years because she also has done something against the law.

小题4:As teachers, we should __________(say again) the important points in class again and again so that some slow students can have a good understanding.

小题5:It is our duty to protect the ____________(环境）because pollution is getting more and more serious.

苗木追肥一般施用（）。

A.有机肥

B.生物肥料

C.迟效性肥料

D.速效性肥料