شرکت در آزمون آنلاین
زبان انگلیسی 2
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زبان انگلیسی 2
| آزمون شماره 6555
There are useful chemical ……… that are made from tobacco, including those which kill most insects.
What does paragraph 2 mainly discuss?
The underlined word “reflect” in paragraph 3 is closest in meaning to ... .