题目

阅读下面短文，掌握其大意，然后从各题所给的A、B、C、D四个选项中选出最佳选项。 Just sign here, sir, the deliveryman saidas he handed Oscar Reyna a package. The package consisted of a long, narrow box 1wrappedin brown paper. 2thebox, Oscar saw an umbrella inside— a very old one with a beautifully carvedwooden handle. 3, he had not seen it in more than 20years, he recognized it 4. Oscarwas 16 when he first saw the5 umbrella. He had gone to a concert with hisgrandparents. As they were leaving, he noticed an umbrella on an empty seat.Impressed by its 6 ,Oscar 与青春期性发育和第二性征发育有直接关系的物质是（   ）A．睾丸和卵巢B．精子和卵细胞C．前列腺和子宫D．雄性激素和雌性激素