词形变换，用所给词的适当形式填空，每空一词。
The classroom is on the          (one ) floor.
How many           (family) are there in the pictnre?
         (not be ) late again.
These are           (we ) books.
– Is this knife          (she )?
- No, it’s        (I ).
This duck is lovely. It has a good name.         (it) name is Betty.
On the left of the box        (be) some books.
There are five         (orange) trees in the park.
        (who) sweater is this?