单项选择题

A．To show how simple the mechanical aids for diving can be.
B．To provide an excuse for his changeable character.
C．To explore the philosophical issues of space travel.
D．To explain why he took up underwater exploration.
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单项选择题
A．At 10:30.B．At 10:25.C．At 10:40.D．At 10:45.
A．At 10:30.
B．At 10:25.
C．At 10:40.
D．At 10:45.
单项选择题
A．To pack his bags for his trip.B．To write his own composition.C．To see a doctor for his illness.D．To pick up some photographs.
A．To pack his bags for his trip.
B．To write his own composition.
C．To see a doctor for his illness.
D．To pick up some photographs.
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