Answer Key^317
the trunk. The pods, which mature throughout the year, encase a sticky, white pulp
and about thirty or forty seeds. The pulp is both sweet and tart; it is eaten and used in
making drinks. The seeds, were you to bite into one straight out of the pod, are incred-
ibly bitter. Not at all like the chocolate that comes from them.
It’s actually a perfect design. The fruit attracts forest animals, like monkeys, who
eat the fruit but cast the seeds aside, dispersing them and allowing new trees to
sprout up. (One of my favorite memories of a recent trip to Costa Rica was watching
monkeys eating in a “chocolate” tree.) It’s hard to imagine why humans ever thought
to do anything with the seeds.*
Written Practice 4-3
1.... at 10:00 P.M.”? 2.... to plant fl owers?” Elsa asked. 3.... your insurance
card?” 4.... of ID as well. 5.... for our appointments?”
Written Practice 4-4
Paragraph 1
My friend asked, “Have you heard about the link of lead exposure to Alzheimer’s
disease?” She had just read the study from the University of Rhode Island that
found a link between early exposure to lead in the environment and the onset of
Alzheimer’s disease much later in life. The scientists cautioned lead poisoning
patients not to fear that their lead exposure would defi nitely lead to Alzheimer’s
disease. They said, “There are, after all, many other things that can affect a person
between youth and old age, aren’t there?”
Paragraph 2
Do you see the world around you going green? Has your supermarket started
charging for bags—either plastic or paper? Will you fi nally decide to ride your
bicycle to the offi ce to help reduce carbon emissions (not even considering the cost
of gas)? Did you remember to turn off the lights before you left home? (And if you
didn’t, will it bother you all day?) Surely, you have switched to energy-effi cient
lightbulbs, or have you? I guess we can agree that going green is not an easy thing
to do, or can we? There’s a popular children’s song that says it all: It’s not easy
being green!
Written Practice 4-5
1.... nuts in it?” Rosa asked. 2.... harm you!” 3.... restaurant? I’m starving.
4.... before we leave? 5.... requests!” 6.... in the car? 7.... mine, are you?
8.... taking Vitamin D. 9.... the game! Isn’t that sad? 10.... correctly. Yea!
*Adapted with permission from facts-about-chocolate.com.