She was so ______about the problem explained by her partner that she wore a ______look.

This is Susan and that is Mary. _ my _ .

I _________ Ann with her Chinese over the years, but she can’t speak it at all.— Never mind, she is too young.

To improve their oral English, everyone in the class is supposed to ________ actively in these discussions.

下列各句中，没有语病的一项是