根据句子意思，用适当的词填空， 使句子意思完整。

  1. There are all kinds of ____________ in the zoo.

  2. We asked the teacher to sing an English __________ for us.

  3. Mother cut the birthday ___________ with a knife at the party.

  4. Ninety-nine plus one is one _____________.

  5. Australia  is  very large, but the population is quite ____________.

  6. It's sunny and there is no _________ of rain.7. Air ________ sounds.

  8. We all __________ with you. Your plan is very good.