五四运动的导火线是巴黎和会上中国外交的失败。 ( )
参考答案：对
上海证券交易所规定，单个会员管理的多个集合资产管理计划由同一托管机构托管的，必须使用不同的席位。( )
— How long has your brother been working in this factory?
— he graduated from college.
A．When
B．By the time
C．Until
D．Ever since
