Our music teacher is always heard _______ in the music room.
#50599
A
sing
B
sang
C
singing
D
to sing
推荐题目
The purpose of new inventions is to make life easier, it more difficult.
#48658
A
not make
B
not making
C
not to make
D
do not make
All the children like Mr. White very much because he often makes them _______.
#49485
A
laughed
B
laugh
C
laughing
D
to laugh