... Animal life is _____ with extinction. a. disappointed b. crowded c. threatened d. threatening 8. An important _____ of conservation is the prevention of waste. a. idea b. part c. knowledge ... _____ thirty minutes every day for several months. a. to study b. studying c. study d. studied 18. Promise me _____ lies again. a. that you’ll never tell b. never tell c. that you never tell ... a. provider b. providing c. provision d. provided23. _____ the food in supermarkets is very attractive. a. Most b. Much c. Most of d. A little24. People use radios, television, telephones,...