①精子细胞         

②卵细胞         

③初级精母细胞

④次级卵母细胞     

⑤精原细胞       

⑥体细胞   

⑦次级精母细胞．

下列各句中划线成语的使用，全都正确的一项是（    ）

①随着公众对政府行为和社会事务的关注与参与度的不断提高，一些地方已开始征收卡拉OK版权费，这对著作权人来说是大快人心的好事。

②都市职场女性剧《欢乐颂》播出以来，大家评价很高，叫好声一片，它成了2016年炙手可热的电视剧目之一。

③没有强大的创新设计、生产制造能力，国家实力的提升就无从谈起，民族复兴的宏伟蓝图也只能是空中楼阁。

④毕加索的抽象画风格为何引人注目？人们一直对此莫衷一是。即便是同一个欣赏者，在不同时间去看毕加索的作品，感受似乎都有所不同。

⑤市民对城市日益堵塞的交通怨言颇多，但市民是否深刻反思过自己对红灯视而不见、横穿公路、跨越防护栏等不可理喻的行为呢？

⑥历经人生的坎坷之后，塞万提斯晚年蜗居在一个下等公寓进行《堂吉诃德》的创作，作品问世后立即引起轰动，但时人并不理解作者的苦心孤诣，只当它是不登大雅之堂的“逗笑”之作。

语法填空

    ____ is well known, optimism(乐观)plays an important role in one's life. Although we are facing many difficulties, we should keep optimistic. Optimism is a mental(精神的)attitude or world view and it means expecting ____ best possible result from any given situation.

    I did ____ (poor) in English in the past, but I never gave up struggling(搏斗). All my families, teachers and friends encouraged ____ (I) and they taught me a lot of ____ (use) ways of learning English. I ____ (keep) practicing as they told me to do. I listened to English news and songs and I read interesting English stories. At weekends, watching some English movies was another good way to make my English better. ____difficulties I came across, I tried my best to work them out. I believe in myself, ____ (believe) that hard work would finally pay off. Gradually, I make progress in my English. Nowadays, I can remember English words ____ (easy) and use them freely when communicating with foreigners.

    Thanks to optimism, I have become one of the top English ____ (learn) in my school now.