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1．聽第10段材料，回答第17-20題．
17．What happened in Apt.407？
A．There was a robbery．
B．Mrs．Horn was attacked．
C．Mrs．Horn's family caught a thief．
18．What will the security team do？
A．Teach people self-defense．
B．Put a security guard at the front gate．
C．Put security alarms in all apartments．
19．What should people do if they have concerns about security？
A．Call the police．
B．Attend a meeting．
C．Lock all doors．
20．What is the best way to prevent theft according to the talk？
A．Being prepared．
B．Keeping strangers from entering the community．
C．Joining the neighborhood security team．

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科目：高中英語 來源： 題型：閱讀理解

11．Orcas，or killer whales，are the largest of the dolphins and one of the world's most powerful animals feeding on meat．They feast on marine mammals such as seals，sea lions，and even whales，employing teeth that can be four inches （ten centimeters） long．They are known to grab seals right off the ice．They also eat fish，squid （魷魚），and seabirds．
Though they often frequent cold，coastal waters，orcas can be found from the polar regions to the Equator （赤道）．
Killer whales hunt in deadly groups，family groups of up to 40 individuals．There appear to be both permanent and temporary group populations of killer whales．These different groups may hunt different animals and use different techniques to catch them．Permanent groups tend to prefer fish，while temporary groups target marine mammals．All groups use effective，cooperative hunting techniques that some are similar to the behavior of wolf packs．
Whales make a wide variety of communicative sounds，and each group has various noises that its members will recognize even at a distance．They use echolocation （回波定位） to communicate and hunt，making sounds that travel underwater until they meet objects，then reflect back，showing their location，size，and shape．
Killer whales are protective of their young，and other adolescent females often assist the mother in caring for them．Mothers give birth every three to ten years，after a 17-month pregnancy．
Killer whales are immediately recognizable by their special black-and-white coloring and are the intelligent，trainable stars of many aquarium shows．Killer whales have never been widely hunted by humans．
37．Killer Whales do not feed onD．
A．seabirds         B．seals                 C．fishes               D．seaweeds
38．The following aspects about killers whales are mentioned exceptC．
A．hunting           B．communication            C．weight               D．habitats
39．We can conclude thatC．
A．people can find killer whales everywhere around the world
B．killer whales live in different groups and never live alone
C．by making sounds killer whales hunt and communicate
D．humans'hunt has made killer whales being endangered
40．Killer Whale are often seen in some aquarium shows becauseA．
A．they are able to be trained
B．they have special body colors
C．they must be protected
D．they have never been hunted．

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