Science and technology have ____in important ways to the improvement of agricultural production.

He was always _______ for knowledge, and at last became an expert in the field of art. 

 He worked late last night, ______, early this morning.

The police ________ Tom of stealing and the accused was afraid to meet the accuser.

More and more people were gathering there. He ________ his way through the crowed and rushed into the burning house.