Please, check my answers:
1.1 B, 2 C, 3 A, 4 C, 5 D, 6 A, 7 C, 8 A, 9 D, 10 B
2.1 eruption, 2 contributor, 3 pollute, 4 allergic, 5 comparison, 6 dangerous, 7 harm, 8 environmental, 9 devastation, 10 friendly
2 I would put ... [Edited by moderator]
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?????? ???????Please, check my answers:
Those exercises were not written by a native speaker. Bear that in mind.
1.8 There is no right answer, but I suspect they're looking for "has been". A natural version of that sentence would read "Now, nuclear waste dumping at sea is forbidden".
1.9 The correct answer is "a". Learn the meaning of the phrase