单项选择题

A．A class presentation they’re preparing.
B．A television program the man is watching.
C．Visiting a close fiend of theirs.
D．Studying for a test.
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单项选择题
A．Separate houses were built for storing ice.B．Double walls were built in icehouses to keep cool.C．Blocks of ice were packed with hay in icehouses.D．Ice was put into icehouses in winter.
A．Separate houses were built for storing ice.
B．Double walls were built in icehouses to keep cool.
C．Blocks of ice were packed with hay in icehouses.
D．Ice was put into icehouses in winter.
单项选择题
A．Call on people to protect sharks.B．Point out the living environment of sharks.C．Explain why the sharks are dangerous.D．An introduction to sharks.
A．Call on people to protect sharks.
B．Point out the living environment of sharks.
C．Explain why the sharks are dangerous.
D．An introduction to sharks.
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