My bag is _______ books. It’s so heavy.
–Are they ______books? --No, they aren't. They're ______ books.
Damao can playbasketball and he can also playviolin.
下面组中的字母顺序前后是正确的。
There is“s” in the word “desk”.
—Mike invited us to take part in the party this Sunday. —Is tomorrow his birthday?