Many people believe the way to really know somebody is...

Câu hỏi: Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer for each of the blanks from 25 to 29.
Many people believe the way to really know somebody is to understand what they mean when they're saying nothing at all! This is the science of (25) ___________ body language. In (26) ___________, learning how to recognise body language and how to use it to communicate your own message is big business. Nowadays, there are hundreds of books written on the subject. Experts are even going into companies to talk (27) ___________employees about how to perform better. They suggest that this can be done with a few changes in their body-talk. Welcoming body language, for example, ought to include giving a friendly (28) ___________ to say hello and leaning (29) ___________slightly to show you want to listen. The problem is, the more we understand body language, the more able we are to change it if we want to.
The word or phrase which best fits the gap (28) is...
A. hand
B. heart
C. body
D. nod