5. Unlike coniferous trees，whose leaves are usually needlelike，the leaves of deciduous trees are typically broad and flat.

　　(A) the leaves of deciduous trees are typically broad and flat

　　(B) it is typical for the leaves of deciduous trees to be broad and flat

　　(C) broad and flat leaves are typical of deciduous trees

　　(D) deciduous trees have leaves that are typically broad and flat

　　(E) on deciduous trees，the leaves are typically broad and flat

　　答案：D

　　类型：比较内容平行

　　解析：unlike后面是coniferous trees，那么句子主语必须也是tree才能保持平行，符合这一要求的只有D选项。

　　6. Even choosing the least expensive rate，the package was so heavy that it cost Jose nearly a hundred dollars to mail it to his cousin in Madrid.

　　(A) Even choosing

　　(B) Even though choosing

　　(C) Even though he chose

　　(D) Although he had chose

　　(E) Although choosing

　　答案：C

　　类型：逻辑主语。

　　解析：choosing的逻辑主语是句子的主语，其动作发出者应该是人，但是句子的主语是the package，因此必须要再choose前加上动作发出者，ABE可以直接排除。D选项中，chose使用错误，因为choose的过去分词应该是chosen，综上只能选C。