Which of the following features is NOT true of IP (intonation phrases) or sense groups?
A、Words in an IP are linked together with no pauses between the words.
B、IPs within a sentence are usually characterized by a short pause, the end of a sentence is recognized by a long pause.
C、Content words in an IP are generally unstressed, while function words are stressed.
D、At least one prominent word is stressed in an IP.