Question

China is trying to find ways to take care of the children       parents have left their homes to work in cities.                                      

A．that

B．who

C．whose

D．which

Answer 1

C

本題后半句修飾children作定語從句，由于先行詞在從句中作定語，而且表示人，通常用關系詞whose，故選C。