Do you hear there was _______ fire in the shopping mall last night?－ Yes. I never thought _______ fire can be so terrible.

Miss Lee, I didn’t catch what you said just now. Could you tell me ___________ again?—OK.

. Mary was only too ready to help others, seldom, _____, refusing them when they turned to her.

There is no doubt______ one day the medicine for AIDS will be made.

Tom often gets some letters from his pen pal. The underlined word “gets” can be replaced by “ ”.