单项选择题

When snow collects on top of a building during the winter, the weight sometimes weakens the construction and occasionally causes the roof to collapse.

A．melts
B．accumulates
C．selects
D．scatters
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单项选择题
A good employer gives hints to his or her employees without interfering with their creativity.
A．freedom
B．assistance
C．clues
D．funds
单项选择题
Beijing Television-Station Transmitting Tower really looks magnificent at night when it's illuminated,
A．decorated
B．illustrated
C．lit up
D．studied carefully
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