Ever since humans have live on the earth，they have made use ofvariou8 forms of commu-nication．Generally，this expression of thoughts and feelings has been in the form. oforalspeech. When there is a language barrier，communicationis accomplished through sign lan．guage in which motionsstand for letters，words，andideas．Tourists and the people unable to hear or speakhave had to resort to this form. of expression．Many ofthese symbols of whole words are very vivid and exact and Can be usedinternationally；spelling，however，cannot．
Bodylanguage transmits ideas or thoughts by certain actions，either intentionally orunin．tentionally.A wink can be a way of indicating thatthe part is only joking．A nod signifies ap-proval，while shaking the head indicates a negative reaction．
Other forms of nonlinguistic language can be found in Braille(a system of raisedDotsreadwith the fingertips)，signal flags，Morse code，and smoke signals，Road maps and picture signsalso guide，warn，and instructpeople．While language is the most common form. ofcom-munication，other systems and techniques alsoexpress human thoughts and feelings．
Which of the following statements bestsummarizes this passage?
A.When language is a barrier，people will find other forms of communication．
B.Everybody uses only oneform. of communication．
C.Nonlinguistic language isinvaluable to foreigners．
D.Although other forms，apart from language of communication exist，theyare of little value．
Anyonewho has ever attended a university knows that the quality of lecturers variesgreatly．A feware very effective communicators，conveying thesubstance of their lectures clearly and interestingly and inspiring students towant to know more about the subjec
It could．of course，be argued thatstudents are not competent to evaluate the academic quality of lectures．If anyone should evaluate lecturers，itshould be their colleagues. However．I am not arguingthat students should be asked to comment on the academic con
I suspect that many of the objections to student evaluation stem from the fearsome lecturers have of being subject to criticism by their students．However，lecturers should see such e-valuation as an opportunity to becomeaware ofDefects in their lecturing t
According to the author，all the students know that________.
A.it is tooDull to attendlectures
B.quite a lot of teacherscan produce the results studentsDesire
C.they must be inspired tolearn
D.there are greatDifferencesamong the lecturers as to their quality of teaching
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