单选题 Once _____, the show can never be forgotten.

单选题 They felt _______ when they heard the wonderful news.

单选题 It is required that the money _____ paid immediately.

单选题 ---- They have done a good job----- _________. _________.

单选题 You can ____my surprise when I heard the news.

单选题 The reason ______ his being late is _____ he didn’t catch the early bus.

单选题 I didn’t hear the phone I _____ asleep.

单选题 ---How did you find your missing pen?---().