单项选择题

The word" nucleus" in the last sentence probably refers to ______.

A．musicians famous in Africa
B．musicians at the center of attention
C．musicians acting as the centre in a performance
D．active participation in a musical performance

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单项选择题

How many colleges allow you to get in touch with them through toll free telephone(免费电话)

A．Four.
B．Three.
C．Two.
D．One.

单项选择题

When Holowka says in the last paragraph, It's going to be big , she means that green buildings ______.

A．will be more comfortable
B．will become popular in future
C．will be more environmentally friend