．_________the fact that doctors have warned that smoking causes cancer, people still keep on smoking

ver tells a lie, ________

It _ __ last night，for the ground was wet this morning.

Our company will move to a tall building _______ we worked two years ago.

Earth Day is celebration of life and our planet. It is a reminder that we need to ________ the world we live in and that we should learn to respect life and nature.