It has been proved______eating vegetables in childhood helps to protect you against serious illnesses in later life.

A. if                            B. because                   C. when                             D. that

D

解析此題考查that引導(dǎo)的主語(yǔ)從句的用法。句中的it是形式主語(yǔ)，真正的主語(yǔ)是eating vegetables in …life,所以要that引導(dǎo)這個(gè)主語(yǔ)從句，而that不作任何成分，也沒有意義，故答案是D項(xiàng)。

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【小題2】What do the words "the follower" in Paragraph 2 refer to?
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Scientists do not know why the honey guide likes eating the wax, but it is very determined in its efforts to get it. The birds seem to be able to smell wax from a long distance away. They will quickly arrive whenever a beekeeper is taking honey from his beehives, and will even enter churches when beeswax candles are being lit.

1.Why is it difficult to find a wild bees' nest?

A．It's small in size.                         B．It's hidden in trees.　

C．It's covered with wax.                    D．It's hard to recognize.

2.What do the words "the follower" in Paragraph 2 refer to?

A．A bee.                                B．A bird.

C．A honey seeker.                        D．A beekeeper.

3.The honey guide is special in the way____________。

A．it gets its food                          B．it goes to church

C．it sings in the forest                      D．it reaches into bees' nests

4.What can be the best title for the text?

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