[单项选择]what is the talk main about（　）.
A. The increase in the number of congressional representatives
B. The process of hiring congressional staff members
C. The role of congressional representatives’ aides
D. The structure of congressional elections

[单项选择]What did they talk about
A. regulations
B. strategy
C. salary

[单项选择]What is the main concern of talk
A. How the tone of a piano is affected by its shape.
B. How to measure a piano’s resonance.
C. How to improve your performance by choosing the right piano.
D. How size makes a piano more expensive.

[填空题]Today, we’ll talk about what other effects watching TV might produce on children. Children should be (1) a lot of television, many experts and parents agree, but there is at least one circumstance when it might be beneficial: (2) . A recent study conducted by Italian researchers found that children (3) immediately preceding and during blood tests experienced less pain than children whose mothers (4) during the procedure, or children whose mothers were present but (5) .
The research, led by Carlo Brown, MD, at the University of Siena, is published in the Archives of Disease in Childhood. (6) the study. None received any type of anesthesia; the children and their mothers (7) . Both the group whose mothers attempted to distract them from the blood tests and those whose mothers simply observed reported (8) than the group who watched cartoons. For that group, the levels of pain were less and the chil