单项选择题

A．He is optimistic about final cures.
B．He is confident that will help.
C．He is doubtful that it helps.
D．He is pessimistic about modem medicine.
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单项选择题
A．To boost book sales.B．To encourage publishers to publish e-books.C．To advertise their machine.D．In order to advertise their software.
A．To boost book sales.
B．To encourage publishers to publish e-books.
C．To advertise their machine.
D．In order to advertise their software.
单项选择题
A．In 1946.B．In 1957.C．In 1959.D．In 1960.
A．In 1946.
B．In 1957.
C．In 1959.
D．In 1960.
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