单项选择题
James got lost in the city, ____ he had to ask for help...
单项选择题James got lost in the city, ____ he had to ask for help.（ ）
高层建筑根据其使用性质、火灾危险性、疏散和扑救难度分为两类，请找出下列哪项是属于二类的项目：( )A.19层...
单项选择题高层建筑根据其使用性质、火灾危险性、疏散和扑救难度分为两类，请找出下列哪项是属于二类的项目：( )
Mary looks great ____ this pair of trousers.（ ）A.byB.i...
单项选择题Mary looks great ____ this pair of trousers.（ ）
