People believe that the weather is changing dramatically

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People believe that the weather is changing dramatically.

The weather is believed to be changing dramatically.

The weather is believed to have changed dramatically.

The weather is believed to change dramatically.

The weather is believed to have been changing draatically.

Giải thích

Chọn đáp án A

Giải thích : : câu bị động kép chuyển đổi từ cấu trúc: People + V1 + that + S V2 = S + be + V1-ed + to V2/ have V2-ed: người ta nói
rằng.... Hai động từ cùng thời nên dùng dạng to V.