For each of the following pairs of sentences, choose the answer that best incorporates the pairs into one complex sentence, using the relative pronoun that follows the pair.
For help with this exercise, see section 16c of Foundations First, Fifth Edition.
Problems come with an increasing world population. They include finding enough food for growing numbers of people. (that)
A. |
B. |
C. |
D. |
People around the globe rely on farmland for their food. Farmland has become increasingly productive in the past century. (which)
A. |
B. |
C. |
D. |
A small farm might have fed a single family in 1900. Today, a small farm can produce more and better crops, thanks to fertilizers, pest controls, and other innovations. (that)
A. |
B. |
C. |
D. |
Farmers grow the crops to feed people all over the world. They need water to have a successful harvest. (who)
A. |
B. |
C. |
D. |
Scientists study climate. Most of these scientists believe global warming is a reality. (who)
A. |
B. |
C. |
D. |
Global warming may cause only slight increases in world temperatures in the next century. It can still disrupt rainfall patterns greatly. (which)
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B. |
C. |
D. |
People live in the Great Plains. They get much of their water from underground aquifers in that dry part of the United States. (who)
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B. |
C. |
D. |
As less rain falls, people use more water from the aquifers. The aquifers will dry out in just a few decades at this rate of use. (which)
A. |
B. |
C. |
D. |
Other countries face even more severe water shortages than the United States. These countries have fast-growing populations and shrinking supplies of water. (that)
A. |
B. |
C. |
D. |
A group of national leaders has met to discuss the world’s water problem. The problem is likely to get worse before it gets better. (which)
A. |
B. |
C. |
D. |