The spring and summer months can make sleep feel impossible, with everything from sweltering temperatures and     16     late-night barbecues to loud birdsong and early sunrises to fight with.

“It’s     17     ordinary to have the unusual bad night;” says Dr Allie Hare, sleep consultant (睡眠顾问) at the Royal Brompton hospital in London. “As soon as you try to sleep, you won’t sleep.”

In summer, our     18     can change. “A regular bedtime and getting-up time is, of all the things I recommend for good sleep, possibly the most important,”     19     Hare.

“The brain doesn’t like getting too hot,” says Jim Home, a professor of psychophysiology (精神生理学) at Loughborough University. You could open a window, but that risk letting noise and light in.

Home recommends a fan, which comes with the white noise—something that many people find comforting. “It doesn’t matter if your body gets too hot in your sleep,     20     your brain keeps cool.”

During the summer, you may try to fit your run in during the evening when the temperature has cooled a little, but this could make it harder to sleep. Physical exercise will     21     the body temperature, and the excitement and motivation of trying to smash your personal bests won’t help.

Save it for the morning; in the evening Horne recommends “a     22     walk, in not too bright light’’. Though he also adds that—like most of this     23    —this is for those weak to sleep. “If you’re a good sleeper, do whatever you like.”

Some people find visiting ordinary museums to be a bit dry. Luckily for them, there are unusual museums to check out, such as underwater museums!

Many underwater museums are ________ by companies that offer guided tours. Depending on the depth of the museum, visitors may be able to view the sculptures from a glass bottomed boat or by swimming on the surface. Other underwater museums are deeper and are most suitable for divers.

One of their main purposes is to create a man-made reef (礁) environment where sea creatures can live. That’s ________ some of the museums are located in areas that were damaged by hurricanes (飓风) or are considered underwater “deserts”. The statues in the museum are designed in a way that encourages the growth of coral and plant life. Over time, the statutes and plants attracted more and more fish to the area.

Florida, U.S.A

Florida is home to different types of underwater museums. The state’s newest underwater museum, the Underwater Museum of Art can be found off the coast of Grayton Beach. This part of the Gulf of Mexico is an underwater desert, so creators hope that the exhibit will ________ the ocean environment.

Cancun, Mexico

For years, Cancun has been a popular ________. And one of the major draws is the water. The Museo Subacuaticao de Arte is an ideal place for divers. There they can enjoy more than 500 statues that help to build a man-made reef. This museum was created to give visitors another choice because the area’s ________ reef has been damaged.

Canary Islands, Spain

Museo Atlantico has an impressive display of more than 300 statues. They focus on man’s interaction with the marine world.

If you are looking for a different museum ________, check out one that’s underwater!

Apps to excite your inner artist

Staying at home without teachers and classmates, you probably will play with your smart phone to get through the long days. But how can you unlock your phone’s full potential? Start downloading some interesting and creative apps that will help you k    51     time and boredom. We have chosen three for you. Try them out and have fun.

Easy Voice Changer

When you watch sci-fi movies, you may have noticed that people can change their voices in phone calls and recordings. Do you want to have this magical a    52    ? Well, Easy Voice Changer will make your wish come true. It’s quite easy to use. Users simply record their voices in the app. Then, it can change to sound like different voices. These i    53     voices of an alien, a robot, a monster, a kid, a bee, a ghost and many more. If you want to have fun with your friends, why not send them a freaky phone recording?

Meme (表情包) Generator Free

We are the meme generation. Young people are not willing to send text. They prefer using memes to make a point i    54    . But do you want meme special memes? Make your own, with Meme Generator Free! The app has more than 1,000 high-quality meme templates (模板) to use. You can choose photo or snap (拍照) one to insert onto the template. Your friends will appreciate your imagination and thank you for giving them a r    55     to laugh.

Psychedelic (迷幻的) Camera

Are you tired of following rules? Do you just want to make something a    56    ? You definitely need to check out Psychedelic Camera. The app lets you choose pictures from your photo gallery and add filters (滤镜) to it. “You can simply power up the camera and view your surroundings in chaotic (混乱) colors and patterns — it’s delightful. So that it is hard for anyone to r    57     you anymore.” said Anmol Sachdeva on US technology website Beebom.