She is an experienced singer. She feels completely( )when singing before a large audience.
A.正确答案Cfor ease
B.in case
C.at ease
D.on case
She is an experienced singer. She feels completely( )when singing before a large audience.
She is an experienced singer. She feels completely( )when singing before a large audience.
A.正确答案Cfor ease
B.in case
C.at ease
D.on case