Напишите необходимый глагол или сочетание для придания предложениям смыслового пассивного значения.
Срочнооо
1)Pete's answer is very good. He _______ praising.
2)Helen's hair is too long. It _____ cutting.
3)They liked the book, ______ reading.
4)His suggestion is very interesting _______ discussiong.