.John is the only one of the students in the class that never______ a mistake even when it is pointed to him.
His father disappeared, ________ two children and never _______ from again.
Does the way you thought of ________ the water clean make any sense?
In order not to be disturbed, I spend three days _______ in my study.
He tried to ________ in Japanese.
They ‘ll have other meetings like this in the weeks ________.