以下4种类型指令中，执行时间最长的是（）。
A. RR型
B. RS型
C. SS型
D. 程序控制指令
In general, pause refers to __________ between parts of an utterance.
A. the loudness
B. the length of silence
C. the clarity
D. the sonority
The speaker must handle pauses with skill to suit __________.
A. speaker's or hearer's needs
B. speaker's identity
C. hearer's emotions
D. speaker's and hearer's ideas
Pauses are frequently made mainly for the purpose of __________.
A. clarity
B. emphasis
C. interpretation
D. taking breath
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