raining hard for 3 hours without stopping. A．...

　　　　raining hard for 3 hours without stopping.

高三英语单项填空简单题查看答案及解析

20. _________raining hard for 3 hours without stopping.

21.

高三英语单项填空简单题查看答案及解析

Rain is pouring down from the sky without any sign of stopping．Farmers begin to worry about their crops since it _____ as long as 24 hours．

A．would rain              B．had rained             C．was raining             D．has been raining

高三英语单项填空简单题查看答案及解析

— Look! How long _____ like this?

— Three weeks! It’s usual here that rain _____ without stopping these days of the year.

A．had it rained; pours                      B．has it been raining; pours

C．is it rained; is pouring                    D．does it rain; pours

高三英语单项填空中等难度题查看答案及解析

— Look! How long _____ like this?

— Three weeks! It’s usual here that rain _____ without stopping these days of the year.

A.had it rained; pours

B.has it been raining; pours

C.is it rained; is pouring

D.does it rain; pours

高三英语单项填空中等难度题查看答案及解析

—How long _________like this?

— Three weeks! It's normal that it rains without stopping these days of the year．

高三英语单项填空简单题查看答案及解析

Hardly had the employees ________ with their work when the rain stopped.

高三英语单项填空中等难度题查看答案及解析

The speaker spoke at the meeting for 2 hours without _____ his notes.

高三英语单项填空中等难度题查看答案及解析

Some people sit outside for hours without getting bitten by mosquitoes, but it always seems like you’re being eaten alive within minutes of stepping outdoors.

If this is you, you’re not alone. According to Smithsonian Magazine, around 20 percent of people in the world are especially tasty to mosquitoes. What about these people makes mosquitoes’ mouths water?

A popular myth claims that mosquitoes prefer certain blood types, but the fact is that they simply can’t tell what your blood type is from a faraway place. Jonathon Day, a professor of medical entomology (昆虫学) at the University of Florida in the US, told NBC it’s not complicated. “The two most important reasons a mosquito is attracted to you have to do with sight and smell.”

Mosquitoes are especially active in the late afternoon. While flying along, they use their sense of smell to find possible targets. They find victims (攻击对象) by smelling the carbon dioxide (CO2) breathed out by humans and animals. That’s why you commonly find them in crowded streets and parks.

Joop van Loon, an entomologist at Wageningen University in the Netherlands, told Live Science, “Mosquitoes start orienting (使......朝向) themselves to carbon dioxide and keep flying upwind as they sense higher concentrations (浓度).”

As a result, people who simply exhale (呼出) more of the gas over time – generally, larger people – have been shown to attract more mosquitoes than others. “This is why kids don’t get bitten as much ... as adults,” US professor Ted Rosen told Science Alert.

This love for CO2 can also put pregnant women at increased risk for mosquito bites, as they tend to exhale 21 percent more CO2 than people of the same age and size who aren’t pregnant.

In addition to carbon dioxide, the color of the clothes you wear also plays a role in attracting mosquitoes.

According to Live Science, mosquitoes can lock onto targets from up to 50 meters away. At this distance, what we wear has a huge effect. Due to their vision (视觉), people wearing dark colors are more likely to become targets.

Being bitten by mosquitoes is annoying, but don’t worry. Some simple tips can help ward them off. Scientists recommend that we use insect repellent (驱虫剂) and wear light-colored clothing.

1.How do mosquitoes locate their targets, according to the article?

A.By seeking out bright clothes.

B.By identifying different blood types.

C.By sensing an increase of carbon dioxide.

D.By following bigger crowds.

2.Why are pregnant women more likely to be bitten by mosquitoes?

A.Their larger size helps mosquitoes to see them.

B.They breathe out more CO2.

C.They are more likely to sweat.

D.Their body temperatures are higher.

3.How does the article advise you to avoid mosquitoes?

A.Exercise regularly.

B.Wear light-colored clothing.

C.Keep your skin dry and clean.

D.Stay indoors in the evening.

4.What’s the article mainly about?

A.A new finding about mosquitoes.

B.How people can avoid mosquito bites.

C.A popular myth about mosquitoes.

D.Why some people are more attractive to mosquitoes than others.

高三英语阅读理解中等难度题查看答案及解析

. The president spoke at the business meeting for nearly an hour without ___ his notes.

A. bringing up   B. referring to        C. looking for        D. trying on

高三英语单项填空简单题查看答案及解析