湖南省永州市高考英语二轮复习：语法填空专项练习

2021年高考英语语法填空专项练习 （一） Today, many people are worried about endangered species. But isn't it just normal for some animals to die out? The situation today is different from 1.________ of the past.In the past，animals died out over a long period of time.When animals died out in the past, it was usually because of the weather or other 2.____________(nature)causes. What is happening today is 3.____________(total)different.We are killing millions of species in a short time.The result is that we are killing our future, because so many species 4.____________ (kill) in such a short time that even 5._______fittest can't survive. In fact, there won't be enough species to choose from.Without enough animals and plants, evolution cannot function and nature will get 6.____________(bad) instead of getting better. Many of the species 7.____________(disappear)on earth are unknown and few people even know that they are dying out.These animals and plants started to live on earth long 8.____________ us and we have no right to kill them.We may also need these species in the future.We must try to keep the endangered species alive.If we allow these species 9.____________(die) out, we are in fact becoming endangered 10.__________(our)． （二） Cleaning your teeth often，every day，is linked to a lower risk of heart problems.A new study found that brushing your teeth several times a day results in 1.____________(few) cases of heart failure.Heart failure happens when the heart cannot do its job of 2.____________(pump) blood round the body.3.____________ the research found is that brushing your teeth three times a day or more was linked to a twelve percent lower risk of heart failure.The researchers 4.____________(examine) information on more than 161,000 people in Korea with no history of heart 5.____________(problem)．They followed up ten and a half years later，and found that three percent had developed uneven heart rhythms 6.____________ that almost five percent had developed heart failure.All the