1.

Directions: Find the part of the given sentence that has an error in it. If there is no error, choose ‘No error’. Densely occupied rooms and tightly (1)/ sealed buildings are the main cause for (2)/ high levels of carbon dioxide. (3)/ No error (4)

A. Densely occupied rooms and tightly
B. sealed buildings are the main cause for
C. high levels of carbon dioxide
D. No error
Answer» C. high levels of carbon dioxide


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