听力原文：M: Ann, do you and your husband plan to have many children？
W: Only two. It's expensive to have a big family now.
What do we know about the woman？
A．She has already had two children.
B．She does not want to have any children.
C．She does not want to have a big family.

What physical features are characteristic of birds that eat insects？ Click on two answers．
A．A thick, cone-shaped bill
B．A slender,tweezer-like bill
C．Strong jaw muscles
D．A long, sticky tongue

According to the professor, why is chemistry sometimes called the central science？
A．Chemistry courses are the most difficult．
B．Chemical processes occur all around us．
C．Chemistry students have high status．
D．Chemists study how to control diseases．

In this passage, what advice does the author have for married women？ __
A．Stay home and take care of their family.
B．Encourage their husband and kids to be happy and have fun while they are away.
C．Help their family learn to prepare food for themselves.
D．Have their whole family take cooking classes together.

What is the main purpose to the talk？
A．To test the students' ability to understand chemistry
B．To explain different kinds of chemical processes
C．To list the jobs available to chemistry graduates
D．To introduce the students to the study of chemistry

The word which in the passage refers to
A．tale
B．Scandinavia
C．manuscripts
D．Old English