In the 20th century, women began living longer, ______ because pregnancy and child birth had become less dangerous.

单选题

Which of the following best explores American myth in the 20th century?

答案解析

单选题

In the 20th century, women began living longer, ______ because pregnancy and child birth had become less dangerous.

答案解析

多选题

The?Puritans?introduced?(????)?education?for?all?children?in?the?17th?century.?(?????)

答案解析

问答题

The students must write ﹍ essays in which they ﹍ life in the 16th century to life in the 21st century.（compare）

答案解析

单选题

Americas first two political parties in the late 18th century were _____.

答案解析