《2025年亮点给力提优课时作业本八年级英语下册译林版》

A(2024·宿迁市泗洪期末)
The “April snow” is here! It’s not real snow, of course—it’s catkins(飞絮) from willows and poplar trees(杨树) in spring. For some people, this “snow” is not welcomed. Catkins can cause allergies(过敏), making people’s noses, eyes, and skin uncomfortable.
In spring, female(雌性的) trees grow lots of flowers. When these flowers finish growing, they bear cotton—like seeds that spread through the air.
Luckily, scientists have found many ways to control catkins. Doing “gender change surgery(变性手术)” on willows and poplar trees is one of them. People cut off the branches of female trees and replace(代替) them with branches from male(雄性的) trees. This cuts down the number of catkins. However, this way is slow and expensive. A skilled worker can do the “surgery” on less than ten trees a day. Scientists in Wuxi, Jiangsu, use special injections(注射剂) to reduce the number of catkins on trees. These injections make the trees mainly use their energy to grow bigger and get more leaves, not to reproduce(繁殖) and make catkins. Xu Qinming, an expert in Wuxi, told Science and Technology Daily that this method is safe for the trees. However, the trees need to get injections every year to keep the catkin number under control.
Besides injections, the trees can take “medicine”. The medicine can be sprayed(喷洒) onto the trees before the catkins form, which can quickly reduce catkin numbers. Still, people need to be careful about how much of the medicine they use and when they use it, or they might hurt the environment.
( )1. According to the passage, ________ can cause some people to feel uncomfortable.
A. the snow in winter
B. branches from male trees
C. special injections
D. catkins from willows and poplar trees
( )2. How many ways are mentioned to deal with catkins in this passage?
A. One. B. Two. C. Three. D. Four.
( )3. What’s the disadvantage(缺点) of using injections according to the passage?
A. It costs a great deal of money.
B. Trees are needed to be injected every year.
C. It needs many skilled workers to do it.
D. It’s unsafe for the trees and environment.
( )4. What’s the main idea of the passage?
A. How to control catkins with new technology.
B. How to make the trees grow healthily.
C. How to tell male and female willow trees.
D. How to protect the environment.

答案： 1. D
2. C
3. B
4. A