Lady Gaga is ­­very popular singer. She has lots of fans.A. aB. anC. theD. /

问题补充：

Lady Gaga is ­­very popular singer. She has lots of fans.

A. a

B. an

C. the

D. /

答案：

A. a

B. an

C. the

D. /

解析：不定冠词的用法。a/an 后接单数可数名词，强调数量“一，一个”。故选A.