( )是世界上现有规模最大的佛教艺术宝库。
A．云冈石窟
B．克孜尔千佛洞
C．敦煌石窟
D．龙门石窟
参考答案：C
— David, your mother’s birthday is _____. Let’s think about how to celebrate it.
—OK, Dad.
A．coming up
B．picking up
C．closing down
D．looking up
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