用所给单词的适当形式填空。

1. Mr Chen wrote a lot of __________ (poem) in his life.

2. Becky is making a speech, ________ (hold) some flowers.

3. My brother ________ (ride) his bike and went to the post office this morning.

4. Could you speak louder? I can't hear you  _________ (clear).

5. I'm afraid of snakes. They are ____________ (frighten).