Задание
Complete the statements using the correct form of 'to be' and the verb. Use the long (full) forms.
Example: They _______________ in the lake. (to swim)
Correct: They are swimming in the lake.
Incorrect: They're swimming in the lake.
He [ ] his dog. (to feed)
We [ ] a song. (to sing)
I [ ] to Peter. (to talk)