56.（）

How did the author introduce the topic of this passage?

• A、By describing grammar errors made by kids.

• B、By sharing experiences of speech therapists.

• C、By using Tom' s case as an example.

• D、By stating his personal views to readers.

 What can be infered from the passage about “l(fā)anguage delay ?

• A、It can be prevented by doctors.

• B、It is seldom found among children.

• C、It can be improved with certain help.

• D、It may result from hearing problems.