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Coal was not used very widely as a sources of energy ...................the last century.

Coal was not used very widely as a sources of energy ...................the last centu

Câu hỏi

Nhận biết

Coal was not used very widely as a sources of energy ...................the last century.


A.
after
B.
when
C.
while
D.
until
Đáp án đúng: D

Lời giải của Luyện Tập 365

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