-
Câu hỏi:
Humans_____ atmospheric carbon dioxide concentration by a third since the Industrial Revolution began.
-
A.
increase
-
B.
have increased
-
C.
had increased
-
D.
were increasing
Lời giải tham khảo:
Đáp án đúng: B
Hãy trả lời câu hỏi trước khi xem đáp án và lời giải -
A.
Câu hỏi này thuộc đề thi trắc nghiệm dưới đây, bấm vào Bắt đầu thi để làm toàn bài
QUẢNG CÁO
CÂU HỎI KHÁC
- Ocean water also will expand if it warms,______ further to sea level rise.
- The clearing of land for agriculture, industry, and other human activities have increased ____ of greenhouse gases.
- Humans_____ atmospheric carbon dioxide concentration by a third since the Industrial Revolution began.
- the desalination plant, the company could offer an effective solution to the problem of water scarcity.
- The public praised the local farmers for _____millions of trees on the surrounding hills.
ADMICRO
