15.Great changes ______ in my home town and a lot of factories ______.

39.To work in such a place you have to be ______ to these things.

5. Why the explosion occurred was ________ the laboratory attendant had been careless．

37.They all ______ your health.

12.The factory produces half a million pairs of shoes every year, 80% _______ are sold abroad.

（ ）也叫“助长性迁移”，是指一种学习对另一种学习的促进作用。

36.We unanimously elected him ______ chairman.

2.教师职业的社会地位包括（ ）。

3.素质教育的核心和灵魂是学生实践能力的培养。（ ）

3. Every boy and every girl ________ pleased when they saw Shenzhou VI was sent up to space.

17.He was lured into a crime he would not ______ have committed.

18.We walked ________ into the forest and lost our way ; we _______regretted it.