The boy isn't good at( ).A,sing B,sings C,singing

The boy isn't good at( ).A,sing B,sings C,singing 单项选择.Listen!The boy is ____ .A、sings B、sing C、singing I am good at （ ）.a：sing b：to sing c:singing d:the i like____ songs A.sing B.sings C.singing I often hear him ( )the pop songs .A sing B sings C singing Listen!She in the classroom.A.sing B.sings C.singing D.is si The girl referred to ______ well.A.singing B.sing C.sings D. I found him in the office.A.sing B.sings C.was singing 1..Listen!A boy in the next room.A.sings B.is singing C.sang Li Wen is a famous star of__.A singing B sing C sings D sing when is a good time ___ the song? A.sing B.to sing C.singing I often listen to him ( ）.A:singing B:sing C:sings D:to sing