B A mosquito is an insect that is found all over the world．There are thousands of different kinds of mosquitoes in many different sizes and colors．The female mosquito needs blood from vertebrates （脊椎动物）to lay eggs and produce more mosquitoes．She has a special part of her mouth that she uses to suck blood，and her saliva（spit）thins the blood so she can drink it．In fact．It’s the mosquito’s saliva that makes the bites itch（痒）! A person who gets bitten by a mosquito will notice a wheal，which is a bump around the bite． The wheal will be round，with pink or red around the edge and white in the middle．The wheal will itch a lot．Soon the wheal will disappear, but the itch will stay． If you’ve been bitten by a mosquito，wash the bite with soap and water．Put on some calamine lotion to help stop the itching，or an adult can find an anti-itch cream at the drugstore for you．Placing an ice pack on the bite may also help．Tell an adult you’ve been bitten by a mosquito，especially if you live in the eastern United States．But if you develop an allergic reaction and feel dizzy or sick，tell a doctor immediately．He can treat allergic reactions with sole medicine． The best way to avoid mosquito bites is to wear an insect repellent．Repellents that include one of these ingredients are best：BEET and lemon eucalyptus．Ask a parent to help you apply them． Since mosquitoes lay their eggs in water，it’s also a good idea to empty out buckets，flower pots，toys and other things in your yard that may have collected water during a rainstorm．And when it’s possible，you’d better wear long-sleeved shirts and long pants to keep mosquitoes away from your skin． 60．What makes you itch after the mosquitoes’bites? A．A bump around the bite．          B．The mosquito’s saliva． C．Some calamine lotion．             D．An antic-itch cream． 61．The underlined word“wheal”（Paragraph 2）is closest in meaning to________． A．a small mouth that can prevent an insect B．a small mark after an insect bite that usually itches C．an illness after an insect bite that always spreads nearby D．an illness from mosquitoes’ bites and other pollution diseases 62．Which of the following is TRUE according to this passage? A．There are thousands of mosquitoes in the same sizes and colors． B．The wheal will never disappear forever but the itch will disappear soon． C．Ask a doctor for some medicine if you develop an allergic reaction for the bite． D．Ask a parent for an insect repellent if you see mosquitoes laying their eggs in water．