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There a lot of manatees, but now there aren’t very many of them．
A． used to have B． used to be
C． are used to be D． used being
查看习题详情和答案>>根据图画及上下文提示，在下面对话的空白处填入适当的话语（话语可以是句子、短语或词），使对话完整。
A: Hey, Ginny．What do you call those big, gray things in the water?
B: 1 ．
A: What?
B: Manatees．They’re very gentle and very shy．
A: 2 ?
B: They’re usually about 10 feet long and they weigh about 1,000 pounds．
A: How much do they eat everyday?
B: They need about 100 pounds of aquatic food a day．
A: 3 ?
B: It is underwater plants and vegetation （植被)．
A: That’s what they eat?
B: Yes, it is．
A: 4 ?
B: Yes, they are endangered．But, we’re trying to save them．
A: Wait a moment．Why are they endangered?
B: 5 ．
A: Where do they live?
B: They live in the swamps（沼泽）．6 ．They are endangered also because there sometimes isn’t enough food for all of them．
A: 7 ．There used to be a lot of manatees, but now there aren’t very many of them left, I think．
B: Yes, 8 ．At this point, there are only about 2, 500 in the U．S．
A: 9 ?
B: Since 1927 laws have been passed to protect them．
A: Thank you for your information．
B: 10 ．
查看习题详情和答案>>根据图画及上下文提示，在下面对话的空白处填入适当的话语(话语可以是句子、短语或词)，使对话完整。
A：Hey, Ginny．What do you call those big, gray things in the water?
B： 1 ．
A：What?
B：Manatees。They’re very gentle and very shy．
A： 2 ?
B：They’re usually about 10 feet long and they weigh about 1000 pounds．
A：How much do they need everyday?
B：They need about 1 00 pounds of aquatic food a day．
A： 3 ?
B：It is underwater plants and vegetation(植被)．
A：That’s what they eat?
B：Yes．it is．
A： 4 ?
B：Yes, they are endangered(陷入困境)．But, we’re trying to save them
A：Wait a moment．Why are they endangered?
B： 5 ．
A：Where do they live?
B：They live in the swamps(沼泽)． 6 ．They are endangered also because there sometimes isn’t enough food for all of them．
A： 7 ．There used to be a lot of manatees, but now there aren’t very many ofthem left, I think．
B：Yes, 8 ．At this point, there are only about 2,500 in the U．S．
A： 9 ?
B：Since 1927 laws have been passed to protect them．
A：Thank you for your information．
B： 10 ．
根据图画及上下文提示，在下面对话的空白处填入适当的话语（话语可以是句子、短语或词），使对话完整。
A：Hey, Ginny．What do you call those big，gray things in the water?
B：__1__．
A：What?
B：Manatees。They’re very gentle and very shy．
A：__2__？
B：They’re usually about 10 feet long and they weigh about 1000 pounds．
A：How much do they need everyday?
B：They need about 1 00 pounds of aquatic food a day．
A：__3__?
B：It is underwater plants and vegetation（植被）．
A：That’s what they eat?
B：Yes．it is．
A：__4__?
B：Yes，they are endangered（陷入困境）．But，we’re trying to save them
A：Wait a moment．Why are they endangered?
B：__5_．
A：Where do they live?
B：They live in the swamps（沼泽）．__6__ ．They are endangered also because there sometimes isn’t enough food for all of them．
A：__7__．There used to be a lot of manatees，but now there aren’t very many of them left，I think．
B：Yes，__8__ ．At this point，there are only about 2，500 in the U．S．
A：__9__?
B：Since 1927 laws have been passed to protect them．
A：Thank you for your information．
B：__10__．
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