it's good _ students _ the classroom clean.A for;to keep B of; to keep C of; keeping D for;keep
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it's good _ students _ the classroom clean.A for;to keep B of; to keep C of; keeping D for;keep
it's good _ students _ the classroom clean.
A for;to keep B of; to keep C of; keeping D for;keep
it's good _ students _ the classroom clean.A for;to keep B of; to keep C of; keeping D for;keep
A for;to keep
A
A
it's +形容词+for sb to do sth常用句型
前面填for
后面填keeping或to keep都行,
选A
A
it's +形容词+for sb to do sth 表示对某人来说做什么事是怎么样的
it's +形容词+to sb to do sth 能够说明人的性格的形容词可用此句型
A 也可以是 for ; keeping
a 对学生来说保持教室清洁是好的