a d-- is a good helper

a d-- is a good helper a dictionary is a good helper. I'm a good helper. 题目A d( )is a good teacher i am only able to have a "dog-helper "because fo your kind d It is the ____ of million of living things.A.helper B.home C This is ( ) news.A.such a good B.a very good C.so good a D.s Is she good at d( ) picture紧急a ( )girl in red is ( ) good student.A.The;/ B.The;a C.A;/ D.A it is a good you is a good he is good a----