Forests are useful to mankind in several ways. Wood is always necessary for building and for making
all kinds of things and we usually need firewood in our homes. Forests provide timber, one of the
most (1)___________ resources, but they must be used wisely and managed (2) _________. Men
should control the cutting of trees in such a way that the forest grows more trees (3) _________ it
would be cut, leaving the young ones to grow bigger. Trees and shrubs are also needed to preserve
land (4)___________ their roots bind the soil, preventing heavy rain from washing the soil away.
1. A. valuable B. reasonable C. comfortable D. famous
2. A. good B. widely C. nicely D. carefully
3. A. as B. than C. then D. that
4. A. because B. because of C. but D. and
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