Choose the best answer
to cut down something is to _______.
A. recycle
B. reuse
C. reduce
D. refill
recycle (v) tái chế
reuse (v) tái sử dụng
reduce (v) cắt giảm
refill (v) làm đầy lại
=>to cut down something is to reduce.
Đáp án cần chọn là: C
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