读等高线地形图，完成下列问题。

下列植物在地球上出现的先后次序是 （    ）                                 
①藻类 ②苔藓类 ③被子植物 ④裸子植物 ⑤蕨类

    As science developed rapidly in the direction of technology, it supplies man a better and more comfortable 1. Men will be working shorter and shorter hours,2 and housewives will also be able to have more free time. Can you 3 doing housework without a housewife? Scientists believe this will 4 into realities in not very long time, and perhaps during your lifetime house-robots will take 5 of housewives.

    When I 6 this kind of machine with housewives, some 90 percent of them replied 7 “How soon can I buy one?” The other 10 percent said, “I would be terrified to see it8 about my house.” But when I explained to them that it could be turned 9 or stopped, they quickly realized that it was a 10 object.

    In my own 11 we have found that the washing-up machine is regarded as a good12in the room. There's no greater13than to go to bed in the evening and 14 that the washing-up is being done downstairs after we are 15.

    Some families would 16 to have their robot slaves 17 all the downstairs housework after they were in 18 at night, while others would have it19 in the mornings. But this would be entirely a matter of20.

    It was the afternoon when we closed on our new house, and I was in the garage (车库). I 1 a part of blanket sticking out of the ceiling; that was 2 I pulled on it, and a way to the attic (阁楼) suddenly3 I climbed a ladder and headed up.

    I climbed into a space 4 the garage that was separated from the rest of the attic. As my eyes adjusted (适应) to the dark, I saw a metal container that I 5as a World War II ammo (弹药) box; my grandfather used to store 6used on his farm in this ammo boxes. I opened the cover and was 7 at what I saw: a lot of money 8 up in orange rope. God, I've found, like $800!

    But there was more than one box of9 I found another seven boxes10to the edge, plus two big black dustbin bags full of money.11 about $45,000. In my attic, I won't lie, my first 12 was that this was a 13 from God—the money to 14 this old house and to make life15for our two young sons. But I 16 that the right thing I should do was to17the money to the former owners. So I called them and asked them to come.

    They were18 of course, not only about the money but that I was returning it. They had recently 19 over the house and said it must have been their dad who had20 the money.