Choose the best words and complete the passage

You may be surprised to learn how many animals actually have a memory. _______ your goldfish can show evidence (證據(jù)） of learning ability. If you have a pet fish, try this _______. Every day when you feed the fish, sprinkle (撒） the food only in the same location.

Keep a record of daily observations (觀察）of the fish, taking down notes about the fish's swimming directions or behavior whenever you come to feed it. Before long, the fish should swim to the spot where you sprinkle the food whenever you approach (靠近） the tank. See how it reacts (反應(yīng)） to your approaching the tank and take notes before, _______, and after your experiment.

In this example of animals' memory, we don't really know if your fish knows the fact that you are going to feed it. But it has showed its _______ ability to learn and to remember.

Bees _______ with each other in a way which shows an intelligent memory. When a bee finds a good location for gathering nectar (花蜜）, it will remember _______ to get to this location from its hive (蜂巢）. The bee then returns to the hive and passes along its memory by doing a complex dance to inform the others of where the food was found. It uses wings, legs, antennae (觸角）and body to deliver the message. When the dance is over, other bees fly to this location to bring back food for the hive.

1.A. Ever B. Never C. Even D. Eve

2.A. experience B. experiment C. exercise D. excitement

3.A. during B. with C. to D. about

4.A. weak B. strong C. bad D. terrible

5.A. compare B. complete C. communicate D. complain

6.A. what B. where C. why D. how

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