You ______have written such a long articleThe teacher said 100 words would be enough

It’s very________ that, in many schools, the students are going to spend less time in doing homework than they used to

下列各句中，没有语病的一句是（ ）

You have joined the Singing Club, haven’t you . I like singing, but I don’t have any time.

No one admittedthe window. [ ]