There are many sources of pollution in our modern world. At present, the

Câu hỏi :

Read the following passage and choose A, B, C, or D to indicate the correct word or phrase that best fits each of the following blanks. Fill in the appropriate word in question 34

A. However

B. Moreover

C. So

D. Because

* Đáp án

A

* Hướng dẫn giải

Đáp án A

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