―Hello!May I speak to Jack, please?  ―Yes, speaking. -Oh, I _______ your voice at first.
#101984
A
don’t recognize.
B
didn’t recognize.
C
hadn’t recognized.
D
haven’t recognized.
推荐题目
He has changed a lot. He _______ not what he _______. 
#104704
A
is, is
B
was, was
C
is, was
D
was, is
My cousin went to Canada two yours ago. He ______ there for a few months and then went to America. 
#101049
A
worked
B
would work
C
would be working
D
has been working
Oh, it's you! I didn’t know you ___ here!
#103970
A
am
B
were
C
have been
D
will be
–Have you handed in your schoolwork yet? --Yes, I have. I guess it ________ now.
#99519
A
has graded
B
is graded
C
is being graded
D
is grading