____________ for a career in dance generally begins at an early age.

• People train

• That people train

• If training

• Training

A baby's first teeth ____________ are generally the lower incisors.

• appearance

• appear

• to appear

• in appearing

A climbing helmet ____________ protection for a rock-climber's head from falling rocks and other hazards.

• to provide

• provides

• providing

• that provides

Power tools require careful handling ____________ injuries.

• by avoiding

• they avoid

• to avoid

• that avoid

An electromagnet is created ____________ electrical current through a coil or wire.

• by passing

• passes by

• to be passed

• passed

____________ at home requires only three types of chemicals, several pieces of simple equipment, and running water.

• For the development of film

• To develop film

• When film is developed

• In developing film

The purpose of cost accounting is ____________ involved in producing and selling a good or service.

• as a determination of its costs

• the costs determined

• that determines the costs

• to determine the costs

____________ was one of the most difficult tasks pioneers faced on their journeys west.

• Crossing rivers

• While crossing rivers

• Rivers being crossed

• By crossing rivers

Energy can be defined as the ability ____________.

• do working

• to do work

• doing work

• work to be done

The process of ____________ by hand has changed little since the fifteenth century.

• to bind books

• binding books

• books are bound

• bound books