Choose the best option to complete each of the following sentences

It is_________to believe that 13 is an unlucky number.

I don’t have time, so I can’t go on an eco-tour to Cuc Phuong National Park
→ If_______________________________________________

Fees must be paid in full at the time of_________

Write a short paragraph (120 -150 words) to describe an environmental problem that happens in your country. You can use the following questions as cues.
* What is it?
* What are its causes?
* What are its effects?
* How can this problem be solved?

Complete the second sentence in each pair so that lit has the similar meaning to the first sentence

Read the passage and choose the best option to fill in each blank
Climate change is a global challenge without borders, and it requires all countries to coordinate closely to combat it. The main cause of climate change is global warming, (1) __________has many negative consequences on physical, biological and human systems, as well as other effects.
The rising (2) __________of greenhouse gases in the earth’s atmosphere is causing global warming. The sun emits shortwave radiations such as ultra-violet radiations and visible light. The earth’s surface (3) __________some of the solar radiation and reflects the rest as longwave radiation, i.e., infrared radiation.
The rise in global temperature is changing several other weather patterns. The Increase in temperatures is causing warming of oceans, melting of ice mass (4) __________an increase in evaporation. These effects are causing several physical consequences such as sea level rise and increased variability in weather patterns. The adverse Impact of these physical changes (5) __________ global warming Is now becoming visible on the biological system. It is also causing several harmful impacts on the marine ecosystem.

“You will improve your English by using an electronic device, such as a laptop”, Hoa told her brother.
→ Hoa told her brother_______________________________________________

What was the name of the boy? His father works for a non-governmental organization (whose)
→ _________________________________________________