II. Read the passage and choose the best answers.
With all of these incredible underwater structures already existing worldwide, a natural question emerges: Why can't we build underwater cities? 
The short answer is that we can. We have the materials, technologies, and construction techniques to support human cities under the sea. However, underwater cities, at least right now, have a cost that makes them unreasonable, which is why we only tend to see underwater structures pop up at expensive resorts around the world.
Nevertheless, architects and engineers have already begun considering plans for elaborate underground cities in various forms. From the Japanese Shimizu Corporation, one such plan imagines an undersea spiral spanning from the ocean's surface down to the seafloor. This structure could house 5,000 inhabitants, generate power, and withstand natural disasters like earthquakes and tsunamis. However, the project costs at least $26 billion and currently only exists as a fantasy.
Still, human innovation has made it possible to build underwater structures in ways that seemed impossible just a short time ago. It may not be long before floating cities, submerged cities, or cities on the seafloor become a reality.
 
1. There are _____________ structures already existing worldwide.
A. underground                B. underwater        C. floating             D. outer
2. What supports human cities under the sea?
A. materials                                                     B. technologies         
C. construction techniques                             D. All are correct.
3. How many inhabitants could an undersea spiral spanning house?
A. 26 billion                     B. 5 thousand         C. 5 hundred          D. 26 thousand
4. What is the closest meaning to “fantasy”?
A. reality                          B. imagination       C. presence            D. actuality
5. What is the main idea of the passage?
A. Materials for Underwater Houses              B. How to Build a House
C. The Future of Underwater Cities               D. Types of Undersea Houses
 
D. WRITING
I. Combine each pair of sentences below to make a complete sentence.
1. We will have more breathing problems. We keep polluting the air. (If)
______________________________________________________________
2. Trang is busy tonight. She can’t go to the concert with us. (so)
______________________________________________________________
3. My grandmother enjoys living in the countryside. It’s quiet. (because)
______________________________________________________________
 
II. Do as directed.
1. (Make a question for the underlined part.)
The Eiffel Tower was opened to visitors on May 6th , 1889.
______________________________________________________________
2. (Rewrite the sentence without changing its meaning.)
Do you agree with me that money is more important than any other thing?
______________________________________________________________
3. (Put the word in the correct order to make a meaningful sentence.)
class / around / their / with / assist / move / robots / students / and / studying. / Teacher / can / the
______________________________________________________________
4. (Complete the sentence with the words or phrases given.)
Among / countries, /Singapore / cleaner / the world.
______________________________________________________________