Mark the letter A, B, C or D to indicate that underlined part that needs correction in each of the following sentences.
16. Even though Mercury is the closest planet to the Sun, it is not actually the hotter.
A B C D
17. Some of the methods used in advertising is unethical and unacceptable in today’s society.
A B C D
18. Astronaut candidates whose are in their 30s and 40s can apply to become a NASA astronaut.
A B C D
19. Spacesuits allow astronauts work outside a spacecraft in orbit, on the moon or on another planet.
A B C D
20. Scientists have discovered a bizarre hell planet which it rains rocks and oceans are made of lava.
A B C D
hotter->hottest
is->are
whose->who
work->to work
which->where
D hottest | B are | A who | A to work | B on which