I haven’t heard from Mary for a long time.A. made a call toB. received a letter fromC. heard her voice
---Look at those shoes, Mike! ---Wow! They look very cool, but I wonder ________.
The scientist’s last words _________us that we should protect the environment around us.
If the question ______ incorrectly, _______ question will be given to you
__________news! Our family will go to Guilin for a ________visit.
John, you play with the knife, or you hurt yourself.