The main topic of the passage is _____.
The main topic of the passage is \_\_\_\__.
industrial
People are contributing to the industrial and agricultural _____ in China.
People are contributing to the industrial and agricultural \_\_\_\__ in China.
According to the passage, _____ is the biggest threat to coral reefs.
According to the passage, \_\_\_\__ is the biggest threat to coral reefs.
Passage 2Questions 6 to 10 are based on the following passage: Half of the world’s coral reefs(珊瑚礁) have died in the last 30 years. Now scientists are racing to ensure that the rest survive. Even if global warning were to right now, scientists predict th
Passage 2Questions 6 to 10 are based on the following passage: Half of the world’s coral reefs(珊瑚礁) have died in the last 30 years. Now scientists are racing to ensure that the rest survive. Even if