\boxed{\rm { provide \qquad leave\qquad turn\qquad be\qquad cut\qquad stop\qquad prevent }} Trees (a) — useful to us in many ways. They (b) — us with food, fruit, shade and shelter. They prevent a region from (c) — into a desert. But it is a pity that the people of our country (d) — trees indiscriminately. It is high time we (e) — such an act of human cruelty towards trees.