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Scientists agree that the world's climate ____ warmer over the past 50 years, but they disagree about the causes.  

Scientists agree that the world's climate ____ warmer over the past 50 years, but they disagree

Câu hỏi

Nhận biết

Scientists agree that the world's climate ____ warmer over the past 50 years, but they disagree about the causes.
 


A.
is becoming 
B.
becomes   
C.
became  
D.
has become
Đáp án đúng: D

Lời giải của Luyện Tập 365

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