【推荐1】There’s no such thing as living alone. Never mind if you’re     1     only person in your house and have no dog, no cat, not even fish. You still have got several billion     2    (roommate) — and so do we all. Some of them are harmless, some are     3    (actual) helpful and some could even kill you. They are, of course, bacteria, fungi(菌类) and viruses, and like it or not, they’re on you, around you, and deeply inside you. The fact that bacteria life is everywhere is not     4    (surprise). It’s something you       5    (learn) from your childhood when your mother told you not to drink water from someone else’s glass. There are lots of bacteria     6     are living in your tea kettle. There are bacteria     7     (sleep) with you on your bed. Scientists are beginning     8     realize) the richness of the microbiome(微生物群系) — which is as complex as the ones     9     (find) in oceans, rainforests, deserts and woodlands. Your house has a microbiome and     10     do you.

Some misunderstanding is putting shark populations at risk now. Thousands of sharks are dying as     1     result of people’s false beliefs.

Female sharks need males to make babies. Some female sharks have the ability to produce a baby by themselves and have young sharks     2     a male shark. That’s something     3    (common) seen in plants and insects like ants and bees.

Shark fins have medical function. Traditionally, shark fin soup     4    (believe) to have health benefits and is quite special in China.     5     modern scientists point out that shark tissue(组织) can be extremely high in poison. What’s more, shark fishing kills up to 100 million animals each year,     6    (endanger) several different species.

If you’re bitten by a shark, you will be a goner. You are more than twice as likely     7    (die) from a lightning strike as from a shark bite, according to the Florida Museum’s International Shark Attack File (ISAF). “Even if you are bitten, the large     8    (major) of people survive”, says Dr. Chapman. There     9    (be) sixty-six unprovoked(无端的) shark bite incidents around the world in 2018, only six of     10     were dangerous, according to the ISAF.