用所给动词的适当形式填空。
1. He used to spend much time _________ (chat) with his friends.
2. My mother was afraid of _________ (see) the monkey.
3. The girl is used to _________ (play) basketball in her spare time.
4. Do you enjoy _________ (watch) TV at night?
5. The books are very ________ (help) and I learn a lot from them.
1.chatting 2.seeing 3.playing 4.watching 5.helpful