单项选择题
The president claimed the terrorists should be held responsible（）the explosions that happened last month in London.
A.for B.on C.at D.about
单项选择题 His parents will be（）him if he fails the examination.
单项选择题 John Preston was tired（）living in east London, in which he had moved after his wife's death.
单项选择题 Could you pleas pay me（）advance?
