Be careful of clauses!

_____ begin their existence as ice crystals over most of the earth seems likely.

• Raindrops

• So raindrops

• What if raindrops

• That raindrops

_____ is a narrow strip of woods along a stream in an open grassland.

• Ecologists use the term "gallery forest"

• What do ecologists call a "gallery forest"

• "Gallery forest" is the term ecologists use

• What ecologists call a "gallery forest"

When _____ is not known.

• was the wheel invented

• the invention of the wheel

• inventing the wheel

• the wheel was invented

In 1850, Yale University established Sheffield Scientific School, _____ .

• engineers were educated there

• where engineers were educated

• in which were engineers educated

• where were engineers educated

Many of Louise Nevelson's sculptures consisted of a number of large wooden structures _____ in complex patterns.

• which she arranged

• she arranged them

• which arranged

• arranged them

William Samuel Johnson, _____ helped write the Constitution, became the first president of Columbia College in 1787.

• whom he had

• and he had

• who had

• had

_____ they are tropical birds, parrots can live in temperate or even cold climates.

• Despite

• Even though

• Nevertheless

• But

_____ advertising is so widespread in the United States, it has had an enormous effect on American life.

• Why

• The reason

• On account of

• Since

_____ towards shore, its shape is changed by its collision with the shallow sea bottom.

• During a wave rolls

• As a wave rolls

• A wave rolls

• A wave's rolling