练习题
About half of the infant and maternal deaths in developing countries could be avoided if women had used family planning methods to prevent high risk   ____1pregnancies, according to a report publishing recently by the Johns Hopking University. ____2The report indicates that 5.6 million infant deaths and 2,000,000 maternal Deaths could be prevented this year if women chose to have theirs children ____3within the safest years with adequate intervals among births and limited their ____4families to moderate size.This amounts to about half of the 9.8 million infant and 370.000 maternal deaths in developing countries, excluded China, estimated for this year by ____5the United Nation’s Children’s Fund and the US Centers for Disease Control respectably. China was excluded because very few births occur in the high risk categories. ____6The report says that evidences from around the world shows the risk of ____7maternal or infant ill and death is the highest in four specific types of ____8
pregnancy; pregnancies before the mother is 18 year old; those after the ____9mother is 35 years old; pregnancies after four births; and those lesser than two years apart.____10

答案详解：
1. 将 had used 改为 used。
因为此句是虚拟语气,表示与现在事实相反,故条件从句中应使用一般过去时。例如:
Many would be wise if they did not think themselves wise. 许多人原本会成为聪明人-如果他们不自以为聪明的话。
2. 将 publishing 改为 published
report和publish时逻辑动宾关系,故应使用publish的过去分词短语来修饰report。例如:
Any discovery that we may make, however small, will remain acquired knowledge. 任何可能的发现,不管多么微不足道,都将成为知识宝库中的一部分。
3. 将 theirs 改为 their
4. 将 among 改为 between
在两次怀孕期间留出足够的间隔时间,故用between。
5. 将过去分词 excluded 改为介词 excluding
excluding意为“不包括……”
6. 将 respectably 改为 respectively
respectively 意为 “分别地 ”，符合句子的意思。而respectably意为“可敬的，值得尊敬地 ”。
7. 将 evidences 改为 evidence
evidence是不可数名词。
8. 将ill改为illness
9. 将 year 改为 years
10. 将 lesser 改为 less