Whooping cranes migrate in winter to__________.
A.find warmth and food
B.raise baby whooping cranes
C.get human help
D.lay eggs
42、 Whooping cranes are native to__________.
A.Mexico
B.South America
C.North America
D.the Persian Gulf
43、 Operation Migration aims to__________.
A.teach adult cranes how to fly
B.lead young cranes on their first trip south
C.breed cranes in special parks
D.transport cranes to the North
44、 The distance covered by the young whooping cranes on their trips south is__________.
A.120 miles
B.1,200 miles
C.1,931 miles
D.2, 000 miles
45、 If Operation Migration is successful, whooping cranes will __________.
A.follow airplanes south every year
B.live in Canada all year round
C.learn to migrate on their own
D.be unable to fly back
第5部分:补全短文(第46~50题,每题2分,共10分)下面的短文有5处空白,短文后有6个句子,其中5个取自短文,请根据短文内容将其分别放回原有位置,以恢复文章面貌。
46、回答46-51题
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