单项选择题

A．No one knows exactly how silk was made.
B．No one knows exactly when silk was made.
C．The history of the silk is a fascinating story.
D．The Chinese people kept the secret of how to make silk for as long as 4,000 years.
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单项选择题
A．He will not leave his school.B．He will stay at home.C．He will go on vacation.D．He doesn’t want to go home.
A．He will not leave his school.
B．He will stay at home.
C．He will go on vacation.
D．He doesn’t want to go home.
单项选择题
A．Thanks to the few eggs the monk took Out of China secretly.B．Thanks to the few eggs the Chinese gave the two monks.C．Thanks to the bamboo canes the monks carried out of China.D．Thanks to the discovery of the secret of the cocoon.
A．Thanks to the few eggs the monk took Out of China secretly.
B．Thanks to the few eggs the Chinese gave the two monks.
C．Thanks to the bamboo canes the monks carried out of China.
D．Thanks to the discovery of the secret of the cocoon.
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