e got everything ready at once, withour guests _________ to come in ten minutes.

Jane is good, kind, hardworking and very clever. _______, I can’t speak too highly of her.

Sometimes the police wear casual clothes to ____ specialtasks.

She is so helpful that she is always ready to help people in trouble. Which of the following is correct for the underlined word in the sentence

Miss Gao asked a question， but it was ___________that nobody could answer it.