四、阅读理解
“Mosquitoes are more likely to bite people with type O blood(O 型血).” Have you heard someone say this before? It's not true! I'm not very picky(挑剔的) about blood types. In fact, I cannot tell which blood type you are. Only doctors can do that.
So how do I choose who to bite?
I can smell the carbon dioxide(二氧化碳) on people's breath. The more you exhale(呼出), the more easily I can find you. This means larger and fatter people are more likely to get my “kiss”.
I can also find food by smelling. You play outside and start sweating(出汗) all over. I can smell the lactic acid(乳酸) in your sweat. So yummy!
I also use my eyes to find food. But my eyesight(视力) is not very good. If you are trying to avoid(躲避) me, do not wear colors such as black, red or dark blue.
()1. Mosquitoes cannot .
A. smell anything
B. tell blood types
C. see anything
D. breathe
()2. Mosquitoes are more likely to bite people .
A. who wear white clothes
B. who are short and thin
C. who just finished exercising
D. who smell sweet
()3. What do we know about mosquitoes?
A. Male mosquitoes live on carbon dioxide.
B. Mosquitoes like strong and sweet smells.
C. Mosquitoes drink all types of blood.
D. Only female mosquitoes bite people.
()4. What can we learn from the text?
a. Why male mosquitoes bite.
b. How to kill mosquitoes.
c. Who mosquitoes like to bite.
d. What mosquitoes can smell.
A. ab B. cd C. ac D. bd

1.B 2.C 3.C 4.B

1. 细节理解题。根据文章第一段最后一句“In fact, I cannot tell which blood type you are.”可知蚊子不能分辨血型，对应选项B。
2. 细节理解题。根据文章中“You play outside and start sweating all over. I can smell the lactic acid in your sweat.”可知刚运动完的人会出汗，更易被蚊子叮咬，对应选项C。
3. 细节理解题。根据文章第一段“I'm not very picky about blood types.”可知蚊子不挑剔血型，即会叮咬各种血型的人，对应选项C。
4. 细节理解题。文章介绍了蚊子喜欢叮咬谁（对应c）、蚊子能闻到什么（对应d），未提及雄蚊子叮咬的原因和杀蚊子的方法，所以选cd，对应选项B。