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阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。

Many schools started online courses for students to study. at home on account of the spread of COVID-19.1., the outcome turned out to be not satisfying, because the online education required teachers to carry out live stream courses using mobile phone software and properly interact with students, which proved2.challenge for many teachers.

Some teachers discovered they left the microphones off before finishing the online courses, and others were frequently interrupted by3.(they) young children's shouting or crying. Sometimes they had to repeatedly reconnect to the platform due4.poor Internet connection,5.annoyed both the students and the teachers. Some schools offered online courses for each subject including sports. Teachers found it awkward6.(give) instructions online because many children did not have enough space to move. Some parents complained that they had to join several different chat groups of different7.(subject) . They also hated to accompany their children taking online courses just to make sure their children were8.(full) concentrated instead of9.(play) video games.

Schools should not put any unnecessary academic burden on primary and secondary students through online classes, the Ministry of Education said on Wednesday. It was recommended that online courses10.(link) to infection prevention and psychological health guidance.

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少年,再来一题如何?
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