新課程能力培養(yǎng)八年級英語人教版
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第二節(jié) 閱讀短文，從方框中所給的選項中選出可以填入空白處的最佳選項，其中有一個多余的選項。
Why don't birds get lost on their long flights from one place to another? 17. ______ Now they're beginning to get the answer.
Not long ago, experiments (實驗) showed that birds rely on (依靠) the Sun to guide them during daylight hours. 18. ______ Tests have showed that some night-flying birds are able to follow the stars in their long flights.
A dove (鴿子) had spent its lifetime in a cage and had never flown under a natural sky. 19. ______ The bird's cage was placed under a man-made star-filled sky. The bird tried to fly in the same direction (方位) as that taken by his outdoor cousins. Any change in the position of the man-made stars made a change in the direction of his flight.
The stars are clearly very important to doves. But when the stars are hidden by clouds, they rely on mountains, coastlines (海岸線), and rivers. 20. ______
A. Yet it showed an inborn (天生的) ability to use the stars to lead the way.
B. But what about birds that fly by night?
C. Scientists have asked this question for many years.
D. People often used doves to send messages.
E. But when it's too dark to see these, the doves fly helplessly, unable to find their way.
答案：17.C 18.B 19.A 20.E
解析：17題前句提問“鳥為何不迷路”，C項“科學家多年來問這個問題”承接自然；18題前講白天靠太陽，后講夜間靠星星，B項“但夜間飛行的鳥呢”過渡；19題前描述籠中鴿子，A項“但它天生會用星星導航”轉(zhuǎn)折并引出實驗；20題前講靠山脈等，E項“若看不見這些，鴿子會無助飛行”進一步說明，D項“鴿子送信”無關(guān)，故多余。
二、完形填空（共10小題，每小題1分；滿分10分）
閱讀短文，理解其大意，從A、B、C、D四個選項中選出可以填入空白處的最佳選項。
The name of the redwood tree comes from its color. Redwood trees are very tall. They're even taller than some 21. ______, for example, a 2-storey (層) house. 22. ______ do they grow so tall? Well, they grow as long as they live. And they 23. ______ a very long time. Redwood trees can live for 2000 years!
Redwood trees usually grow by the sea. The 24. ______ there is just right for them. It's not too cold or too 25. ______. There's a lot of rain. Redwood trees grow well in rain.
If you see a redwood tree, you'll 26. ______ that its bark (樹皮) is really thick. It's 15 to 30 cm thick. Bugs (蟲子) 27. ______ redwood bark, because it had a bad taste. The thick bark helps 28. ______ the trees from fires, too. Redwood trees are very big, but their seeds (種子) are 29. ______ small. A redwood seed is as small as a tomato seed. In fact, 30. ______ redwood trees don't come from seeds sometimes. New redwood trees can grow from the stump (樹樁) of an old redwood tree.
答案：21.D 22.B 23.A 24.C 25.B 26.D 27.A 28.B 29.C 30.D
解析：21. 樹比建筑物（如兩層房子）高，選D（buildings）；22. 問“如何長這么高”，選B（How）；23. 壽命長用live，選A（live）；24. 海邊的天氣（weather）適宜，選C（weather）；25. 不冷也不熱（hot），選B（hot）；26. 會發(fā)現(xiàn)（find out）樹皮厚，選D（find out）；27. 蟲子不喜歡（dislike）樹皮，因味道差，選A（dislike）；28. 保護（stop...from）樹免受火災(zāi)，選B（stop）；29. 種子相當（pretty）小，選C（pretty）；30. 新（new）樹有時不從種子來，選D（new）。
