He arrived on the day ______ there happened to be no plane tickets left for Shanghai.[ ]

Jenny was _________ to hear the news thattheir team didn’t win the game.

Please speak louder. My grandfather is a little ______ . — Sorry, I _____ .

______ we have confidence and determination, we can win the match

mbers that researchers get from the experimentscan be _______, just like number puzzles.