Read these sentences and choose 'Past Perfect' or 'Past Perfect Continuous'.
1. The students had texted.
Past Perfect Continuous
Past Perfect
2. They had been swimming in the pool.
Past Perfect Continuous
Past Perfect
3. They had helped their father.
Past Perfect
Past Perfect Continuous
Помогите английский, где Past Perfect и Past Perfect Continuous, это надо выбрать какой из них вариант правильный.