Soil ... four components: rocks, water, air, and leaves

• is

• have

• has

• are

There ... several reasons why I am learning English.

• is

• was

• have

• are

One of the most important aspects of employee satisfaction ... a sense of control over the work environment.

• is

• are

• have

• has

In that year, the total rainfall in California ... only 49 percent of the historical average.

• were

• was

• is

• are

Before cable television became common, there ... only four television stations in most parts of the country. Now there are hundreds.

• is

• are

• were

• was

There ...at least three resons why a college degree is important today.

• have

• has

• is

• are

Unlike the university library, the public library ... material for the general public.

• have

• has

• is

• are

Both the China Institute and the Brooklyn Museum ... Asian art.

• have

• has

• is

• are

The walkway over the freeway is dangerous at night because it ... enough lights.

• does not have

• do not have

• is not

• are not

Beginning in 1921, American women ... the right to vote.

• was

• were

• had

• have