题目内容：

    Do you have any online classes? It is________to take classes at home. All you need is a computer and a headset（耳机）.________, most students don't seem to like online classes. According to a recent survey, ________of the students want to take such classes, but only about 33 percent. Over 1, 500________from 10 cities took the survey.

Many students said it is difficult________them to focus on studying while taking online classes. This was_______ for Lian Ruohan, 15, at the Affiliated（附属的）High School of Peking University. “There are no classmates, no real teachers________me. I can surf the Internet or do other things if I want to. It's________to always stay focused,” she said.

Lian prepares a lot________she takes classes to make sure she will pay attention. She also pushes herself to______with teachers. Students can________and answer questions while taking online classes.

But Wen Jiayi, 14, at the Yucai Middle School Attached to Chengdu No. 7 High School, ________online interaction（互动）isn't enough. "The online teachers don't________get to know me. When I don't hand in homework, all I get is________short message instead of real concern（关心）,” she said.

“However, online classes still have other________. It saves time and money compared with offline classes. Also, if I don't understand some parts of a lesson, I can watch it over again,” Lian said.

1.A.common B.possible C.fantastic D.strange

2.A.However B.Perhaps C.Finally D.Therefore

3.A.both B.each C.all D.some

4.A.students B.teachers C.schools D.classes

5.A.on B.with C.for D.to

6.A.right B.true C.wrong D.important

7.A.asking B.teaching C.calling D.watching

8.A.hard B.easy C.simple D.useful

9.A.after B.before C.when D.as

10.A.do B.agree C.communicate D.compare

11.A.come up with B.put up with C.catch up with D.end up with

12.A.likes B.takes C.thinks D.realizes

13.A.nearly B.probably C.quickly D.really

14.A.the B.a C.an D.（不填）

15.A.instructions B.advantages C.questions D.answers