An adaptation to the large amounts of rainfall that many rainforest plants have is called “drip tips”．Their leaves are tapered (逐渐变细) to a sharp point at the end．This allows water to run off the leaf quickly．There are many other adaptations that rainforest plants have made to their environment．These will be discussed in detail，as we investigate the plants of the rainforest!

　　1．Which of the following is a difficulty that the rainforest plants have to face?

　　A．Changes in their “body” or “habits”．

　　B．Soil that is not very deep．

　　C．Epiphytes that grow on trees’ trunks．

　　D．The worsening of the natural environment．

　　2．How do lianas adapt to the environment in the rainforest?

　　A．They grow under big leaves for protection．

　　B．They rely on other plants to reach the canopy layer．

　　C．They change their leaf structure constantly．

　　D．They grow on other plants’ branches．

　　3．The underlined word “This” in Para．3 probably refers to ________．

　　A．the take-in of sunlight

　　B．the large amounts of rainfall

　　C．the leaves’ having a sharp point at the end

　　D．water’s running off the leaves quickly

　　4．What can be inferred about rainforest plants?

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