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13. EDIT. Read the text about prehistoric people’s use of spices. Find and correct five more errors
with noun clauses.

Ancient Foodies?

that
Researchers have found # ancient Europeans were cooking with garlic mustard seeds over

5000 years ago. The findings come from archaeological sites in Denmark and Germany, where
the seeds were found inside pieces of pottery. Archaeologists think people used the seeds in
their cooking. Because the seeds have no nutritional value, archaeologists are convinced that
were used to add flavor to other foods.

The researchers have explained why are their

findings important. Although other examples of ancient
spices have been found, these seeds are the first to be
linked to cooking. In earlier studies, scientists weren't
sure if or not these spices had been used in cooking.

Experts believed that prehistoric people simply ate
food for energy without caring about its taste. Until
the garlic mustard seed discovery, they had no idea
how much did early humans think about their food

preparation. Now scientists realize that flavor was
important to people long ago. In the future, researchers
would like to find out what other spices did early
humans use, but it won't be an easy task.

14 APPLY.
A_ Write in your notebooks. Use noun clauses with the phrases in the box to answer the
questions. Use your own ideas.

I think (that)... I’m (not) concerned (that)... I don’t know if / whether...
I believe (that)... I’m (not) sure (that)... I wonder if/whether ...

1. Is solar cooking a good idea?

| believe solar cooking is a good idea because it saves energy.
2. Why do you believe that some people choose to become vegetarians?

3. Are you worried about our food varieties disappearing?
4. Are you concerned about eating food that has chemicals in it?

5 A lot of food is wasted. Do you think this is a big problem? Why, or why not?

B_ Work with a partner. Share your answers to exercise A.

A: I believe solar cooking is a good idea because it saves energy.

B: I agree. I think it’s healthier, too.

402 NOUN CLAUSES AND REPORTED SPEECH
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