TO or ING

The results of the study must be interpreted with caution because all of the participants were from a similar background. We do not know how much they differ from people who did not agree ______ in the study.

• to participate

• to complete

• participating

• completing

After World War II, farmers began ____ new technology to increase food production. (2 correct answers)

• to vary

• to use

• varying

• using

For this study, we intend ____ children's monthly growth over time.

• making

• to make

• measuring

• to measure

Small details can have a big impact on local climate, which is one reason that we expect the effects of climate change ____ depending on geographic location.

• to express

• to vary

• expressing

• varying

Researchers in Sydney are attempting ____ the cause of certain speech problems by scanning the brains of newborn babies.

• growing

• finding

• to grow

• to find

Research finds that most girls have stopped ____ by the time they are 17 years old.

• to grow

• to measure

• growing

• measuring

Barnes hopes ____ the study of the recycling program by the end of next year.

• to complete

• to find

• completing

• finding

An open-ended survey allows participants ____ their ideas freely within the categories created by the examiner.

• to express

• to participate

• expressing

• participating

It is not reasonable to insist that environmental objectives take precedence over all other goals. Public policy involves ____ choices.

• to make

• making

• to take

• taking

"Feldenkrais exercise activities" require concentration. Individuals are expected ____ about what they are doing as they move their muscles.

• to think

• thinking

• to express

• expressing