Toefl Section 2 - STRUCTURE & WRITTEN EXPRESSION

In the early 1 900s, Eastman_____ inexpensive Brownie box cameras.

• it developed
• it was developed
• developed
• developing

_____ the discovery of the fossilized remnants of tides in one-billion-year-old rocks.

• Geological reports
• Geologists report
• The reports of geologists
• Geologists’ reports

The Brooklyn Bridge_____ took thirteen years to complete.

• in New York
• is in New York
• it is in New York
• which New York

Genes control all of the physical_____ we inherit.

• that traits
• that are traits
• traits that
• traits are that

Indigo can be extracted from a plant, and then_____ to dye cloth blue.

• it
• using
• using it
• it can be used

_____ in the United States spends 900 hours per year in class and 1,170 hours in front of the television.

• The average third-grader
• The third grade is average
• There are three grades
• Three average grades

Researchers have begun studying what _____ is on human circadian rhythms.

• it is the effect of light
• the light affects
• is affecting the light
• the effect of light

If calcium oxide remains exposed to air, _____ to calcium carbonate.

• turning
• turns
• it turns
• the turn

Some early batteries used concentrated nitric acid, ____gave off poisonous fumes.

• they
• then they
• but they
• but they had

The sound produced by an object______ in a periodic way involves more than the simple sine wave.

• it vibrates
• vibrating
• is vibrating
• vibrates