This magnificent waterfall stands as an oasis in the heart of the Grand Canyon. What does the underlined part mean?
A. in the front of
B. in the midst of
C. in the centre of
D. in the light of
This work must be done within the time.
A. give
B. giving
C. gave
D. given
Along the roads, there are beautiful flowers that delight travelers'.
A. eye
B. eyes
C. sight
D. seeing
Living creatures are living in harmony the surroundings.
A. within
B. with
C. to
D. of