There are two extra choices in the right column.
右侧栏目中有2个多余选项。
There are two extra choices, which do not fit in any of the blanks.
有两个多余选项，不适合任何空格。
it places extra burdens on teachers
它给教师增加了额外的负担
There are two extra choices in the right column.
右侧栏目中有2个多余选项。
There are two extra choices, which do not fit in any of the blanks.
有两个多余选项，不适合任何空格。
例句取自历年考研英语真题，翻译为机器生成，仅供学习参考。