I don’t think he _______ a new bike.

As we stepped into the room, the man in the wheelchair looked up from under shaggy, unkempt hair. His eyes met mine and after a pause, he ____________ a bloodcurdling groan.

_____ all the inventions have in common is ______ they have succeeded.

With the development of reform of education, many teachers are ________ some more effective methods of teaching. [ ]

Zhang Guoli ________ the public ________ his son’smisbehavior.