A. escapes B. appears C. increases D. hides
22. The reason why Phil's predictions aren't pleasing is that_____________.
A. some of the predictions were unavailable B . Phil wants to do that for fun
C. Phil likes to make unpleasant predictions D. he has predicted more late springs
23. How does Punxsutawney Phil become a celebration?
A. By an accident.
B. From people's life improving.
C. By his own attractive force D. From much money raised by the town.
24. Which does this passage mainly talk about?
A. The National Climate Data Center B. A German tradition
C. A tongue-twisting small town D. Groundhog Day weather forecasting
B
Mosquitoes have an extraordinary ability to target humans far away and fly straight to their unprotected skin. Regrettably,mosquitoes can do more than cause an itchy(发痒的)wound. Some mosquitoes spread several serious diseases,including Dengue,yellow fever and malaria.
Over one million people worldwide die from these diseases each year. New research now shows how mosquitoes choose who to bite.
Mosquitoes need blood to survive. They are attracted to human skin and breath. They smell the carbon dioxide gas,which all mammals breathe out. This gas is the main way for mosquitoes to know that a warm-blooded creature is nearby.
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