1. Gravity makes water (run) ______________ downhill.
2. Sad movies always make me (cry) ____________.
3. It’s difficult (get) ____________ used to (eat) _____________ with chopsticks.
4. Stop (argue) __________ and start (work) ______________.
5. I used (swim) _____________ in the river.
6. He warned her (not /touch) ______________ the wire.
7. He is too busy (take) ______________ care of her.
8. It takes me hours (write) ______________ the letter.
9. He gave up (smoke) _____________ years ago.
10. (look) _______________ at me and (answer) ______________ my question.
11. He told me (try) ____________ (come) ____________ early.
12. Is there anything worth (buy) ____________?
13. I enjoy ___________________ (listen) to music