no life has been found outside the earth, but while some scientists are activelysearching for living things in outer space, others firmly believe there ______

He _______ English by making word cards. But now he _____ it by listening to tapes.

Does your father still smoke—No, he has succeeded in_____ smoking for three years.

When I talked with my grandma on the phone, she sounded weak, but by the time we ________up, her voice had been full of life

I think this room is _____ than that one .