大侠们行行好,救一下我这个英语菜鸟,帮我讲明一下答案和Grammar……

大侠们行行好,救一下我这个英语菜鸟,帮我讲明一下答案和Grammar……1.The shoting centre is about 50 kilometers______Beijing.A.south of B.in south of C.the south of D.southern of2.It's based on the idea______ all people are created equal,______is accepted by most people.A.that;that B.which;which C.which;when C.that;which3.-Do you mind if I keep pets in this building?-______.A.I'd rather you didn't actualy B.Of course not.It's not allowed here.C.Great.I love pets.D.No,you can't4.Studies show that people are more ______ to suffer from back problems if they always sit before computer screens for long hours.A.likely B.possible C.probable D.sure