几个200405的语法题，还请各位大虾多多赐教。^_^

vicki_vane

几个200405的语法题，还请各位大虾多多赐教。^_^

16.The male cicada sound is made by specialized structures on the abdomen and which apparently severs to attract females.

33.Of every the major traditions of wood carving, the one that is closest in structure to the tree is the crest pole made by the Native Americans of the Northwest coast.

38.Evidence from ancient fossils indicates the scorpion may had been among the first land animals.

39.Jetties, piers designed to aid in marine navigation, are constructed primary of wood, stone, concrete, or combinations of these materials.