用所给单词的适当形式填空。使句意完整、正确。

1. There are ten ____________ (box) in the classroom.

2. Children's Day is on the ____________ (one) of June.

3. Tom's schoolbag is ____________ (heavy) than Jim's.

4. Is this postcard yours? No, it's ____________ (her).

5. Liu Tao and his mother ____________ (go) for a walk after dinner yesterday.