2.在下列每組單中,有一個單詞的加粗部分與其他單詞的加粗部分的讀音不同，找出這個詞。

• A、father

• B、thief

• C、neither
  

• D、thus

51＿＿

45.What can be seen in a rainforest according to the text?

• A、Leaves and branches of a tree never actually touch those of the other trees.
• B、Tree diseases make life more difficult for leaf-eating insects.
• C、Tall trees protect themselves from forest animals with their branches.
• D、The ground floor is all covered by leaves and branches.