单项选择题
A．worked in a city office and was poorly paid B．was poorly paid and had a large family to support C．was poorly paid and always spent money carelessly D．was out of work and had a large family to support
A．they had to arm themselves with wooden sticks B．they protected themselves with stone clubs C．they had to travel in groups D．they never traveled at night
A．so we can travel anywhere without difficulty B．because we are provided with all kinds of convenient means for traveling C．because traveling organizations can be found in the countries the world over D．so travelers have increased rapidly