John is very . －if he promises to do something he’ll do it.
A. independent
B. confident
C. reliable
D. flexible
网友回答
A. independent
B. confident
C. reliable
D. flexible
解析：考查形容词词义。A项独立的；B自信的；D灵活的均不和句意； 根据后句关键词promises ----he'll do it 可知他是可靠的，可信赖的，选C。