When the teacher ______ how to do the experiment, the bell rang.
#37863
A
explains
B
will explain
C
was explaining
D
is explaining
推荐题目
Fish ________ without (没有)water .
#42450
A
dies
B
is dying
C
won’t die
D
will die
Tom, ______ the other boys in our class, ______ playing games.  
#38647
A
like, likes
B
like, like
C
likes, likes
D
likes, like
Amy loves to talk about travel, she ____ many places of interest.
#40164
A
has gone to
B
has been to
C
has gone for
D
has been from