金魚が「水槽つきの車」を運転して、水の外の部屋でゴールにたどり着いた

Q1. What is the passage mainly about?

1. AA goldfish that learned to drive a car to a target
2. BA new kind of food for pet fish
3. CHow to clean a fish tank
4. DWhy goldfish cannot see through water

金魚が車を運転して目標まで行けるようになった話なので、正解は A。

Q2. What made the car move?

1. AA scientist pushed it
2. BThe fish swam to one side and faced out
3. CThe fish ate food
4. DThe room lights turned on

「When the fish swims to one side and faces out, the car moves that way」とあるので、正解は B。

Q3. In the passage, "clear" in "the clear tank walls" is closest in meaning to ___.

1. Adirty
2. Bthick
3. Ceasy to see through
4. Dvery cold

金魚は壁ごしに目標を見ることができたので、clear は「透明な、すけて見える」の意味。正解は C。

Q1. What is the passage mainly about?

1. AWhy goldfish live longer in large tanks
2. BAn experiment in which goldfish steered a wheeled tank on land
3. CHow scientists trained goldfish to jump out of water
4. DA camera that can take photos under water

金魚が車輪つきの水槽を陸の上で運転した実験の話なので、正解は B。

Q2. When did the platform roll in a certain direction?

1. AWhen the fish stayed in the middle of the tank
2. BWhen the fish ate food
3. CWhen the fish swam near a wall and faced outward
4. DWhen a scientist pressed a button

「When a goldfish swam near a wall of the tank and faced outward, the platform rolled in that direction」とあるので、正解は C。

Q3. What can we guess from the fact that the fish reached the target from a new spot?

1. AThe fish were using the target they could see, not just repeating one path
2. BThe fish could not see anything outside the tank
3. CThe new spot was closer to the food
4. DThe scientists moved the target for each fish

スタート地点が変わっても目標に着いたので、同じ道を覚えただけでなく、見える目標を頼りに進んでいたと考えられる。正解は A。

Q1. What is the main point of the passage?

1. AGoldfish can drive a cart and can also adjust when its steering is changed
2. BGoldfish need more food than other pet fish
3. CMammals cannot learn to use new steering
4. DCarts for fish are now sold in pet shops

金魚が台車を運転でき、操縦の仕組みを変えられても合わせられたことが中心なので、正解は A。

Q2. How did the team change the steering in the 2025 study?

1. AThey made the cart stop whenever the fish moved
2. BThey made the cart move 45 degrees to the right of where the fish faced
3. CThey moved the pink board closer to the start
4. DThey turned off the camera above the tank

「the cart moved 45 degrees to the right of the direction the fish faced」とあるので、正解は B。

Q3. Which statement would the writer most likely agree with?

1. AThe results show that goldfish learn exactly like humans
2. BEvery goldfish in the study became a skilled driver
3. CThe study was small, and not all of the fish completed the training
4. DThe drift after normal steering returned was large and certain

「Only 8 of the 12 fish finished basic training」とあり、数が少なく全員が練習を終えたわけではないと述べているので、正解は C。