16．He looked around and caught a man _______ his hand into thepassenger’s pocket．

Everyone passed the exam ______ him. So he was sad.

The volcano erupted violently , yet the village at the foot of it should _________.

The company is quite honest and guarantees the new product ______ be under warranty for three years.

Progress ____so far very good and we are sure that the work will be finished on time.