14．Where is the left-behind kid（留守儿童）from？
A．From a big and rich city．
B．From a foreign country．
C．From a mountain village
17．How old is the boy？
A.8 years old．
B.12 years old．
C.15 years old．
18．How do you think the boy feels？
A．Happy．
B．Lonely．
C．Hopeless，
19．What are the boy's parents？
A．Farmers．
B．Doctors．
C．Teachers．
20．How often do the boy's parents give him a call？
A．Every day．
B．Twice a week．
C．Once a month．
