Choose the correct answer for each sentence

ai giúp mik vs
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II. Choose the correct answer for each sentence:
16. How the massivestones were brought here to build the Pyramid remains a
A mystery
17. The waste from the chemical factory is extremely.
A. harmless
18. Niagara Falls is a great
A. tradition
19. The Great Pyramid of Giza is one of the most famous
A. artificial
20. The factory was fined for
A. erupting
B. mysterious
C. mysteriously
D. mysticism
B. harmful
C. harm
D. unharmed
on the border of the USA and Canada.
C. spectacle
wonders of the world.
C. temporary
B. evacuation
D. relaxation
B. natural
D. modern
chemicals into the river.
B. providing
C. dumping
D. supplying
21. Several villages around Mount Sinabung were buried in and,
A. destruction/ injury B. eruption/ lava
C. ash/ debris
D. aid/ shelter
22. Today, more and more teenagers are taking part in a local or international,
B. amusement
C. wonder
A. game
D. summer camp