—Jim, your bedroom is so dirty.—Sorry, Mum. I ________ it at once.
#54064
A
have cleaned
B
cleaned
C
clean
D
will clean
推荐题目
--How many boys _______ in your group?--Four.
#59817
A
are there
B
is there
C
there are
D
there is
      a lot of trees in this area, but now we can see a museum instead.
#59515
A
There used to have
B
There used to be
C
There used to having
D
There used to being