根据短文理解，从A、B、C、D四个选项中选择最佳答案填空。

    Do you think of your parents? "Yes, of course," you may answer, "I buy a present for my mother on 1. And I give my father a present on Father's Day, 2. "Then what about the other days of a year? Always 3 to think of your parents, not just on some important days.

    I have a friend who 4 alone, because her parents live in another city. One day I went to see her. We had a nice chat. Then she wanted to make a 5. She dialed the number, but then she put the phone 6. After about ten seconds, she dialed the number again, "Hi, Mum……"

    Later I asked, "Why did you dial the number 7?" She smiled, "My parents are old. They can't get close to the telephone 8. I always do so when I call them. I just want to give them 9 time to answer the call."

    My friend is a good girl. She is always 10 her parents. You also want to be a good child, right? So why not learn from her?

豌豆果实示意图如图所示，那么该豌豆子房内的胚珠数量至少有（　　）

2015年9月22日至28日，******对美国进行国事访问，中美关系已成为构筑21世纪大国关系的重要一环．回顾历史，两国之间的关系既紧张又缓和，在不同历史时期呈现不同的特征．阅读材料，回答问题．【弱国被欺】材料一   1958年美国人伊罗生出版的《浮光掠影-美国关于中国与印度的形象》一书，将美国对中国的总体看法分我六个阶段；…②轻视阶段（1840-1905）…④赞赏阶段（1937-1945）…⑥敌对时期（1949-▲）-摘编自哀明《略伦中国在美国的形象》【并肩作战】

材料二  1941年12月，中美关系发生了转折性变化．美国开始正视中国战场对于抗击日本的巨大作用，迫切需要中国战场牵制与消耗日本的战斗力． -张殿清《抗日战争时期的中美关系及启示》

【激烈对抗】材料三   图1

【握手言和】

材料四 图2

【期待共赢】

材料五 近年来，由于美国实施重返亚太战略，在中国的钓鱼岛和南海问题上都可以看到背后美国的身影经济上美国不断实施贸易保护主义也严重损害了中国的对外贸易，中美摩擦不断．