Scientists therefore agree that it is (i) ________ spread of global warming before it is too late. Solar radiation and volcanic emissions (ii) ________ produce natural global warming. Yet. the major responsibility for turning global warming into a potential dangerous activity falls on humans. Ever since the Industrial Revolution, the burning of fossil fuels to power cars and generate electricity (iii) ________ to the ever-increasing emission of toxic carbon monoxide and carbon dioxide into the atmosphere. These gases trap heat and lead to the formation of the so-called greenhouse effect, which in turn (iv) ________ global temperatures. Only decisive government measures will curb down and limit the growth of this destructive (v) ________ on our planet.
(iii)______
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Lời giải:
Báo saiĐáp án B. has led
Since + mốc thời gian trong quá khứ, mệnh đề chia ở thì hiện tại hoàn thành.Chủ ngữ ở đây là “the burning of fossil fuels…” Ở so ít, nên ta dùng “has +PI1