单项选择题

According to the first paragraph, gelatin________.

A．is a protein that can be obtained from animals
B．is harmful to human bodies
C．should not be made into a dessert
D．is lacking in tryptophan and arginine

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单项选择题

Which of the following best concludes the main idea of this passage

A．There are many types of historical documents.
B．Homer's epics are about the earliest histories.
C．Ancient sagas may be related to reality.
D．There is a volcano near the coast of Sicily.

单项选择题

The one-eyed giant in the Odyssey________.

A．might be a volcano in fact
B．lives in the volcano of Mount Etna
C．lies ill the sea off the coast of Sicily
D．is a real person in history