Listen! Can you hear them _______ in the next room?
#48588
A
practising to sing
B
practising singing
C
practise singing
D
to practise sing
推荐题目
She is often seen ______ the old woman.  
#50014
A
help
B
helping
C
to help
D
help to
You’ve spent too much time _________football.
#50831
A
play
B
playing
C
played
D
to play