1.The dumplings taste _____.please help yourself.
1.The dumplings taste _____.please help yourself.
A.bad B.so-so C.wess D.delicious
为什么?
2.I can hear the girl _____ in the next room.
A.singing B.is singing C.sing D.for singing
为什么?
3.Look!The people_____ working hard.
A.is all B.are all C.all is D.all are
为什么?