用所给动词的适当形式填空。1. David often ___________ (help) me with my English.
2. Can you ___________ (put) an egg on your head?
3. Look, the farmers ___________ (pick) apples on the trees.
4. Nancy ___________ (play) the piano at the concert tomorrow.
5. The children went to the farm yesterday. They ___________ (have) fun there.1. helps 2. put 3. are picking 4. is going to play / will play 5. had