Question

The First Americans
There was a time long ago when a land bridge connected Asia and North America. The first settlers in North America crossed this land bridge from what is now Siberia to Alaska. The people who made this initial(最初的) crossing were probably following the animals they used for food. Eventually, the oceans rose and the land bridge between the continents disappeared. The settlers, who I shall call the “First Americans”， could not return to their homeland. _小題1:__
For the next few thousand years, the First Americans migrated（遷徙） south and east throughout North and South America. They made the journey all the way from Alaska to the southern tip of South America, a distance of more than 10, 000 miles. __小題2:__In the far north, above the Arctic Circle, the First Americans became hunters of the ocean.  __小題3:__ In the brief summer，they gathered berries and other plants. In the winter, they stayed in lodges much of the time preparing for the next summer. It was a hard life，but they learned to survive in these harsh conditions.
Farther south, in what is now Arizona, Utah, Colorado, and New Mexico, the First Americans became cliff dwellers(懸崖居民). They began by living in caves that already existed in the cliffs.__小題4:__ The dwellings(住處) they constructed in many ways resembled today's apartment buildings.__小題5:__ They built a system of dams and canals so they could store and use water almost any time of the year. They were so successful that they could raise fruits and vegetables that were not found naturally in the desert. In Mexico and South America, the First Americans founded civilizations that were among the greatest in the world. They built huge pyramids, lived in fabulous cities, and made great advances in science and mathematics long before the Europeans arrived.

A．They also discovered foods like corn and potatoes.

B．Along the way，they established（建立） many different civilizations.

C．The First Americans of the Southwest learned to irrigate（灌溉） the desert.

D．They would have to survive in the New World they had discovered.

E. They built boats of animal skins and hunted or fished for their food.
F. People living near each other tended to share similar environments and customs.
G. They discovered how to add to the caves by building structures of wood and stone.

Answer 1

小題1:D
小題2:B
小題3:E
小題4:G
小題5:C

試題分析：本文講述了最早的美洲人通過大陸橋到達(dá)了北美，然而當(dāng)海平面上升后，大陸橋被淹沒，他們只好呆在美洲，再也回不到家鄉(xiāng)了，于是他們就慢慢地朝南朝東拓展遷徙，在此過程中，有些人學(xué)會了灌溉，有些人學(xué)會了狩獵，于是各種文明應(yīng)運(yùn)而生了。
小題1:D根據(jù)前句they could not return to their homeland.他們回不去了，和下文對他們生存方式的講述可以判斷D選項(xiàng)能在此起到承上啟下的作用，故D選項(xiàng)正確。
小題2:B根據(jù)上文可知他們從最北邊的阿拉斯加一直向東向西遷徙，而B選項(xiàng)里面的Along the way在語義上恰好能和上文相銜接，故B選項(xiàng)正確。
小題3:E前句 the First Americans became hunters of the ocean.講最初的美洲人成了獵人，而E選項(xiàng)內(nèi)容恰好與狩獵有關(guān)，而且能承接上文，所以E選項(xiàng)正確。
小題4:G前句They began by living in caves that already existed in the cliffs.他們開始居住在山洞里，縱觀選項(xiàng)，只有G選項(xiàng)內(nèi)容與前句內(nèi)容相銜接，意思是“他們發(fā)現(xiàn)了如何給山洞增加些木頭和石頭結(jié)構(gòu)。”所以選G。
小題5:C后句They built a system of dams and canals so they could store and use water almost any time講述他們是如何儲存和使用水的，而C選項(xiàng)內(nèi)容講述人們知道如何灌溉，恰好能引出下文，由此判斷C選項(xiàng)正確，，