单项选择题

A．It served as a fertilizer for crops.
B．It formed a new mountain.
C．It stabilized air temperatures.
D．It destroyed various insect pests.
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单项选择题
A．The Philippines.B．Mexico.C．Brazil.D．Guatemala.
A．The Philippines.
B．Mexico.
C．Brazil.
D．Guatemala.
单项选择题
A．Castles’ structure and the eating habit in them.B．Castles’ structure and the people who lived in them.C．Castles’ structure and the life in them.D．Why people built castles and their structure.
A．Castles’ structure and the eating habit in them.
B．Castles’ structure and the people who lived in them.
C．Castles’ structure and the life in them.
D．Why people built castles and their structure.
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