用所给词的适当形式填空。

1. She feels good about_________ (help) others.

2. _________( eat) too much sugar is bad for your teeth.

3. __________( thousand)  of tourists want to visit the beauty of Chengdu.

4. The food tastes____________(well). How delicious !

5. Tea wasn't __________ (bring) to the western world until 1610.