1. (2021·深圳模拟) 阅读下列短文，从下面每小题所给的A、B、C、D四个选项中，选出最佳选项。

Math is considered as a very difficult and boring subject by some students. They don't know how to learn it well. Here are some of the best math websites for students. If you have trouble learning math, they might be helpful to you.

Buzzmath

Buzzmath focuses on helping middle schoolers practice their math skills. It has high­quality questions, gives immediate and detailed feedback (反馈)，and lets students progress at their own speeds. Teachers of the online courses (课程)also receive detailed results that help them guide their students.

Grades: 6 to 9

Kahoot!

It is a popular website. Why not use it to teach math? Let your students make use of this game­based classroom­response system that can be used by the whole class in real time. Multiple­choice questions are shown on the screen, and then students answer them with their smartphones or computers.

Grades: K to 12

Math Central

Run by the University of Regina in Canada, this website offers free resources (资源) to math teachers and their students. Users can search for answers to math questions. They have a Human Face page including information about the possible jobs in math as well as the introduction of mathematicians.

Grades: K to 12

Numberock

Teachers know that one of the best ways of learning is through songs. Numberock features (以……为特色)ad­free music videos of songs about math topics, like fractions, money, and integers, produced by an Emmy Award­winning studio. Numberock also has anchor charts, worksheets, comics, games and more.

Grades: K to 5

1. （1） Who of the following will be most likely to visit Buzzmath?

   A . Teachers who are searching for free online resources. B . Students who like using smartphones or computers. C . Teachers who want to improve their ability to teach English. D . Middle school students who have difficulty in learning math.
3. （2） What is the feature of "Kahoot！"？

   A . It is specially designed for home use. B . It only allows the top students to play math games. C . It allows the whole class to use it at the same time. D . It mainly offers difficult questions to university students.
5. （3） Which website is helpful for people who want to find careers in math?

   A . "Kahoot！" B . Buzzmath. C . Math Central. D . Numberock.
7. （4） What do we learn about Numberock?

   A . It usually costs users a little money. B . It provides fun ways for students to learn math. C . It focuses on students' ability to develop hobbies. D . It encourages students to create songs about math.
9. （5） What is the purpose of the passage?

   A . To give tips on math learning. B . To compare four math websites. C . To advertise some free math websites. D . To introduce some useful math websites.