单项选择题

Greenspan is aware of these problems，but he doesn’t seem to believe there was any way he could have done__________about them.（）

A．anything
B．something
C．nothing
D．everything

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__________from the top of a mountain，the beautiful peak is a magic that captures his emotion.（）

A．Viewing
B．To view
C．View
D．Viewed

单项选择题

The director __________their representatives is to attend the conference.（）

A．or
B．and
C．as well as
D．rather than