A．When a country has serious economic problem.
B．When a country sells more products overseas thanit imports.
C．When the value of the products a country importsis greater than the value of the product it exports.
D．Whena country can't develop its natural resources.
A．shortage
B．situation
C．increase
D．products
A．Low labor and material costs in Asiancountries.
B．A lack of natural resources
C．An underdeveloped industrial base.
D．The high cost of exported items.
A．do not pay their workers sufficient wages
B．are hurt by a trade imbalance
C．import labor and materials from overseas
D．provide a strong industrial base that prevents atrade deficit