改变过去的行为习惯中，首先是摆脱和改变过去的行为习惯，同时还要建立新的（）才真正有助于新行为的建立。
参考答案：行为链
Robot, can you ____________ the bed? [ ]
A. do
B. make
C. wash
I’m calling about the apartment you __the other day. Could you tell me more about it?
A．advertised
B．had advertised
C．are advertising
D．will advertise
