单项选择题

______ is forbidden in the meeting-room but we are allowed ______ in the room for smokers.

A．Smoking, smoking
B．Smoking, to smoke
C．To smoke, smoking
D．To smoke, to smoke
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单项选择题
______ her husband ______ the room, she jumped to her feet to meet him.
A．Heard, enter
B．Hearing, enter
C．Hear, to enter
D．Hearing, enter
单项选择题
The boat sailed slowly, keeping ______ to the coast as the man in it was afraid of ______ the direction.
A．close, lost
B．close, losing
C．next, losing
D．closely, lost
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