单项选择题

How many causes of bad breath does the passage cite

A．One.
B．Two.
C．Three.
D．Four.
<上一题 目录 下一题>
热门 试题

单项选择题
Who have found a protein called M2
A．Scientists from a Belgium University.
B．Drug-makers in Belgium.
C．Doctors in a Belgium hospital.
D．it is not mentioned.
单项选择题
The working contract is offered on a________ basis.
A．two-month
B．twenty-month
C．ten-month
D．twelve-month
相关试题