请选择ABC4y1B5B.E*t2z2p3i1Z;}(}+k-EIt’s ____the west of China ./t*[5Z4j1A+Q:n6D+U3s
A． on/t*[5Z4j1A+Q:n6D+U3s
B． in/t*[5Z4j1A+Q:n6D+U3s
C． for/t*[5Z4j1A+Q:n6D+U3s