Chia đúng dạng từ trong ngoặc

1. My sister sometimes (go)... to the zoo.
2. They decided (take)........to trip to Vietnam this summer
3.  I think you should (water).......the flowers everyday
4. If you ask me for help, I (help)...    you.
5. I (buy)...... a good dictionary yesterday morning.
6. So far, I (not/see) ......a camel.