The first and smallest unit that can be
discussed in relation to language is the word. In speaking, the choice of words
is{{U}} (31) {{/U}}the utmost importance. Proper selection will
eliminate one source of{{U}} (32) {{/U}}breakdown in the communication
cycle. Too often, careless use of words{{U}} (33) {{/U}}a meeting of the
minds of the speaker and listener. The words used by the speaker may{{U}}
(34) {{/U}}unfavorable reactions in the listener{{U}} (35)
{{/U}}interfere with his comprehension; hence, the transmission-reception
system breaks down.{{U}} (36) {{/U}}, inaccurate or indefinite words may
make{{U}} (37) {{/U}}difficult for the listener to understand the{{U}}
(38) {{/U}}which is being transmitted to him. The speaker who does not
have specific words in his working vocabulary may be{{U}} (39) {{/U}}to
explain or describe in a{{U}} (40) {{/U}}that can be understood by his
listeners.
【正确答案】
A
【答案解析】[解析] is of the utmost importance意思是“非常重要的”，相当于extremely important。“be+of+某些抽象名词”表示“具有……”，等于该抽象名词的形容词的意思。如：This bridge is of great significance．(这座桥具有重大意义。)
【答案解析】[解析] it在此处为先行词，作形式宾语，实际宾语是“for the listener to understand...”。当不定式作宾语，还带有宾语补足语时，必须用it作形式宾语，而把作宾语的不定式短语放在宾补的后面。
【正确答案】
C
【答案解析】[解析] message意为“信息”，在其后的定语从句中，which代替message作is being transmined的主语。transmit与message搭配。A项speech“发言，讲话”：B项sense“意识”和D项meaning是“意思，意义”，都不与transmit搭配。
【正确答案】
D
【答案解析】[解析] unable意为“不可能的”，常用于be unable to do sth．的结构，主语大多是人。 A项obscure意为“暗的，模糊的”；B项difficult意为“困难的”；C项impossible意为“不可能的；无法忍受的”。B、C两项不能用于此结构中。
【正确答案】
D
【答案解析】[解析] in a way是固定搭配，意思是“以某种方式”。A项case意为“情况；案例”，不说in a case；B项means意为“方式，方法”，不说in a means，应说by means of; C项 method意为“方法”，不与in搭配，可说with a method。