He wondered if he could slip out of the lecture hall without anyone _____.

This pair of shoes _______.[ ]

To his relief, the company’s exports have been increasing ______ [ ]

I received his mother’s phone call at ten.Only then did I know that he was badly________in an accident the day before yesterday.

What have been doing _______? I’ve been so little of you. –I have to leave early for work and comes home very ________.