单项选择题

Doctors see a connection between increased amounts of leisure time spent ______ and the increased number of cases of skin cancer.

A．to sunbathe
B．to have sunbathed
C．having sunbathed
D．sunbathing
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单项选择题
Christie stared angrily at her boss and turned away, as though ______ out of the office.
A．went
B．gone
C．to go
D．would go
单项选择题
Greatly agitated, I rushed to the apartment and tried the door, ______ to find it locked.
A．just
B．only
C．hence
D．thus
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