单选题
A
To be measured
in terms of its members, teaching is B
the world"s biggest profession
. Though the roles and functions of teachers vary C
from country to country
, the variations are generally greater within a country than D
they are
between countries.
【正确答案】
A
【答案解析】解析：To be measured—Measured。句意：按照从业人员的数量来衡量，教学是世界上最大的职业。尽管教师的角色和功能在每个国家有所差异，但这种差异在一个国家的内部比存在于国家之间的还要大。考查作谓语动同，因为后面句子的主语teaching和这里的measure之间是被动的关系，所以需要用measured。