According to the report, how many overseas are now' studying in Britain

A．High education fees
B．Difficulty in graduation
C．Visa problems
D．Competition from other countries

A．the world is short of oil reserves
B．the global economy is booming
C．the demand for oil has surpassed the supply
D．the oil quality is going down

A．The issue of oil
B．The issue of federalism
C．The issue of trade
D．The issue of army