A model or an experiment in a science class can help us see things which would       remain hidden.
#22676
A
therefore
B
yet
C
otherwise
D
still
推荐题目
I have got _____ work to do on a ______ cold day.         
#24017
A
much too, too much
B
too much, too much
C
too much, much too
D
much too, much too
Mr.Brown ___ goes to bed before midnight.
#24722
A
hardly ever
B
almost ever
C
hardly never
D
seldom never