_江苏成考网

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.

54＿＿

46.How much of the land surface on Earth is covered by rainforests?

• A、More than 50%.
• B、Nearly 12%.
• C、Less than 5.3%.
• D、Around 22.5%.