下列关于育种原理或方法的叙述正确的是（　　）

根据短文内容，请将单词填写在题号对应的横线上。
    We're offering free tickets to go and see a film called A Year in Greenland. The film, which ____ (tell) you all about the plants and animals in that wonderful country, has won ____ prize at the national film festival- it's well worth ____ (see).
    The film can only be seen at the new cinema that has just been completed inside the Science Museum in the city centre. It's showing this Sunday with ____ (perform) every hour from midday onwards, with the last showing at 5 o'clock, two hours before the museum closes. So there are six times to choose ____.
    So why not take the whole family to the cinema this Sunday. Children will want to head straight down to the basement ____ the computers are kept. I promise you they'll come away with all sorts of ____ (excite) pictures they've created.
    Entrance to the museum is free on Sundays, but it would ____ (normal) cost ﹩3.25 to go and see the film. ____ (get）your free tickets, you should e-mail this program by midday on Friday. We've only got a limited number of tickets, so the ____ (early) you e-mail us, the more likely you are to get one.

I was impressed by his s____ manner of speaking.

名句积累与运用。

①晨兴理荒秽，____。（《归园田居》陶渊明）

②潮平两岸阔，风正一帆悬。____，____。（《次北固山下》王湾）

③____，归雁入胡天。（《使至塞上》王维）

④生，亦我所欲也；义，亦我所欲也。二者不可得兼，____。（《孟子》二章）

⑤杜甫心系苍生，胸怀国事。安史之乱时的他在《春望》一诗中，移情于物，以“____，____”表达了感时伤世的复杂情怀；而年过半百的他目睹苍凉秋景，在《登高》一诗中以“____，____”抒发了自己沦落他乡，年老多病的无限悲愁。

⑥唐代诗人王维以写景见长，《使至塞上》一诗中所描摹的“____，____”的奇丽景观就体现了苍凉雄浑之美。

⑦在陶渊明《饮酒》一诗中，表现物我合一、恬淡闲适心境的句子是：____，____。

⑧文天祥在《过零丁洋》中表现爱国情怀和坚贞民族气节的诗句是：____？____。

化简﹣2（m﹣n）的结果为____