1 . 听下面一段独白，回答以下小题。
1. What is the talk mainly about?
| A．Ways of saving energy. |
| B．The history of Daylight Saving Time. |
| C．The role of Daylight Saving Time in wartime. |
2. When are clocks set back an hour in the United States?
| A．In the spring. | B．In the summer. | C．In the autumn. |
3. What was people’s opinion about Benjamin’s plan for Daylight Saving Time at first?
| A．Clever. | B．Confusing. | C．Ridiculous. |
4. When were the beginning and ending dates of Daylight Saving Time fixed in the U.S.?
| A．In the 1960’s. | B．In the 1790’s. | C．During World War II |
