用所给动词的正确形式填空。 1. We know the earth _____ (travel) around the sun. 2. Can you see the students _____ (plant) trees on the hill now? 3. —Where's your father? —He _____ (clean) the car behind the house. 4. I am sure she _____ (be) a very good teacher in a few years. 5. He wanted my help. So I stopped _____ (help) him. 6. Was Jane very busy _____ (plan) a boat trip with you last night? 7. It is very important _____ (not give) your goldfish too much food. 8. The boss usually makes his workers _____ (work) for twelve hours every day. 9. David _____ (fall) off the tree and hurt his legs a moment ago. 10. Millie, _____ (not frighten) the dog, or it will bark at you. |