Про­чи­тай­те текст и за­пол­ни­те про­пус­ки A–F ча­стя­ми пред­ло­же­ний, обо­зна­чен­ны­ми циф­ра­ми 1–7. Одна из ча­стей в спис­ке 1–7 лиш­няя. За­не­си­те цифры, обо­зна­ча­ю­щие со­от­вет­ству­ю­щие части пред­ло­же­ний, в таб­ли­цу.

Worms and fish do it. Birds and bees do it. But do jellyfish fall asleep?

It was after midnight A _______________________ where the jellyfish were kept. They left the lights off and walked through the room by the glow of their cellphones. The students did not tell anyone that they were doing this. The secret they were keeping was a "totally crazy" experiment aimed at finding out whether jellyfish sleep.

A few weeks before, B _______________________, whether jellyfish needed to sleep. "Of course not," said one of them. "Sleep helps C _______________________. Jellyfish are so simple they don't even have brains. How could they possibly share the need to sleep?" The others weren't so sure, but they wanted to find out.

The three students designed an experiment to test different behaviors and see if the jellyfish were asleep. They watched the animals to see how they moved, and D _______________________when they were resting. It turned out that the jellyfish moved about 30 percent less at night. It was also harder to get their attention.

Months of late-⁠night studying led to amazing results. Young scientists reported E _______________________ sleeplike behavior. This made it the first animal without a brain known to do so. The results suggest F _______________________ life, as the jellyfish group of animals first arose about 700 million years ago, and has stuck with us ever since.

1.  how talkative they were in a situation close to

2.  that sleep evolved early in the history of animal

3.  that the upside-⁠down jellyfish Cassiopea showed

4.  strengthen memory and keep the brain healthy

5.  the students were having coffee and started debating

6.  when three science students crept into the lab

7.  if they could get the jellies' attention