The little boy finished his painting all by himself.( )
A.his ownB.along
C.aloneD.together with him
It's already tens of years____the world's population reached five billion.( )
before
after
since
We must remember____.( )
what our teacher said
what did our teacher say
what has our teacher said
We don't know if our friend ____.If he____,we'll let you know.( )
comes;comes
comes;will come
will come;comes
It's getting dark.You'd better ____out by yourself.It's dangerous.( )
not go
not to go
to go
Look out!The food on the plate smells____.You can't eat it.( )
badly
bad
good