—— The audience was very young children so there was a lot of noise while the concert was going on.
86. In the following spring , the seeds should be knocked _______ the seed-heads and sown .
85. You should say "I am sorry " when you knock ________ somebody.
84. Can't you keep your dog _______coming into my yard? It is always disturbing us.
83. It is said that Hong Kong will be joined _____ the mainland _____ a beautiful bridge on the sea in the near future.
82. When we heard the news that our team has won more than 30 gold medals Athena Olympic Games, we sang and danced _____ joy.