Questions 11 to 13 are based on the following talk on greenhouse gas. You now have 15 seconds to read Questions 11 to 13.

Which is the most important greenhouse gas

Which of the following sustainability programs is NOT m...

单项选择题Which of the following sustainability programs is NOT mentioned in Wal-Mart’s report

As the new Prime Minister, which aspect did Kevin promi...

单项选择题As the new Prime Minister, which aspect did Kevin promise to improve in Australia

It’s difficult for the experienced parents to decide wh...

判断题It’s difficult for the experienced parents to decide whether to work or stay with their children.