He changed so much that only when I looked closely________he was exactly my long lost friend.
A．I realized B．did I realize
C．I did realize D．realized I
－Personally，I believe I can do it well on my own.
－________Selfconfidence is the first secret of success.
A．It's up to you. B．Take it easy.
C．Let' s get going. D．I'm with you on that.
I've had a cookie，but you'd better give me________．I want to taste again.
A．other B．another
C．others D．the other
The video，Gangnam Style，is becoming the first video________more than one billion views.
A．got B．getting
C．to get D．gets
The problem is so complex that I'm afraid it will take me several hours to________．
A．put out B．set out
C．break out D．figure out
George once told me that he would visit our house，but，for various reasons，he________so far.
A．didn't B．hasn't
C．hadn't D．wouldn't
