The world’s forests are quickly ______, a) leaving, b) disappearing, c) hiding, d) reducing, Forests ______ a large part of the Earth, a) take, b) cover, c) fill, d) hold, In the ______ forests, many species survive, a) left, b) staying, c) remaining , d) continuing, Rainforests are ______ to millions of species, a) house, b) home , c) place, d) shelter, These are ______ rainforests, a) old, b) antique, c) ancient , d) aged, Tourists may ______ brown bears in the wild, a) raise , b) increase, c) lift, d) grow, Humans often ______ with animal behaviour, a) disturb, b) interrupt, c) interfere , d) mix, Bears usually ______ humans, a) block, b) ignore, c) avoid , d) escape, This was a clear ______ of danger, a) mark, b) signal, c) sign , d) symbol, Humans can be a serious ______ to wildlife, a) danger, b) risk, c) threat , d) harm.

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