reserves are very important forpreserving many animals and plants, which would _______ run the risk ofbecoming extinct.

There was _________ no wind and the air was very hot

Nothing that he suggested _____ to be of any use.

Parents,of course,will do everything they could to ________ their children from harm.[ ]

To be able to catch up with the other students, he needs ___ hard work; he needs your encouragement, too.