STRUCTURE 2

Most geologists believe __________ from the remains of

tiny marine plants and animals that died millions

of years ago.

• what was formed petroleum

• that petroleum was formed

• when petroleum formed

• petroleum that formed

The seat of France's North American holdings

in the eighteenth century was Quebec, and the

French heritage _________ dominant there.

• to remain

• remaining

• by remaining

• has remained

If Earth did not rotate, differences in air pressure

would be __________, with winds blowing from high-

pressure to low-pressure areas

• primary air flow to cause

• the primary cause of air flow

• they primarily cause air flow

• air flow has a primary cause

A mobile is a sculpture constructed of pans so

delicately connected and balanced __________ the entire

suspended structure may be moved by vibration

or manual manipulation.

• in order

• making

• with

• that

The ice of a glacier that reaches the sea breaks off________.

• and forming icebergs

• to form icebergs

• icebergs have-formed

• when the formation of icebergs

Migraine headaches are more frequent among

women ___________ among men.

• than

• however

• except for

• as air

South American flamingos can survive in temperatures ___________ above the freeing point.

• that fewer degrees

• if few degrees

• only a few degrees

• when fewer degrees

Made of hard wood, the boomerang is roughly V-shaped, with arms __________ skewed.

• of slightly

• are slightly

• slightly

• that those are slightly

Not until the late nineteenth and earth twentieth centuries _________ as a unified science.

• did ecology emerge

• when ecology emerged

• ecology emerged

• when did ecology emerge

The ancient Egyptian water clock required sophisticated calibration, since water dripped faster from its bowl when ___________ and the pressure was greater.

• the full bowl

• was the bowl full

• bowl full

• the bowl was full