.If we humans beings continue to waste and destroy natural resources without using _____ energy, such as the energy from the sun, wind and water, our earth will be done for.
The living room is clean and tidy, with a dining table already ________ for a meal to be cooked.
Computers and mobile phones, though they are indeed making our life________ and more________, have reduced the need for face-to-face communications.
The news shocked the public, ________to great concern about students’ safety at school.
.Everything comes with________ price; there is no such________ thing as a free lunch in the world.
Teachers recommend parents________ their children under 12 to ride bicycles to school for safety.