关于英语选择的几个问题

关于英语选择的几个问题1.this year we'll priduce___steel as we did last year.A.three times as much B.as three times much C.as much three times D.three times much as选A2.___how to operate a switchboard,I had to ask the office supervisor to show me the correct procedures.A.Not known B.Not to known C.Not knowing D.Having not known选C3,Respect for the law is the foundation of civilize living ,___breaks it will be punished.A.who B.whoever C.people who D.No matter who选B4.His marked changes in personality were ___by a series of unfortunate events in his life.A.brought to B.brought out C.brought about D,brought up选c.5.The class needs a monitor___.A.whom everyone has confidence on B.who everyone has confidence ofC.for whom everyone has confidence D.in whom everyone has confidence 选d,这些题请教下原因.