I doubt ______ she will change her mind.
A) whether C) as
B) that D) though

A．Compared to the previous products, the newly designed ones ______.
B．costs a little more
C．requires special skills
D．takes much space
E．sells quite well

A．Headsets shouldn't be used any more.
B．We should use headsets in a proper way.
C．Noise is dangerous to our hearing.
D．Damage caused by noise may not be found in the early years of life.