The teacher asked the students to do the experiment __________ small groups.
Sales of CDs have greatly increased since the early 1990s, when people _______ to enjoy the advantages of this new technology.
In many countries, colors _______ express feelings and enliven language.
I’ve stayed in a lot of different hotels, and nothing else _______ this one.
The fellow I _______ a worker was really a general manager.
He was always the last to leave in order to clean up the workshop and _______ the tools.