a great help成立吗,能等于a great deal of help

a great help成立吗,能等于a great deal of help be a great help还是 be a great helpful A交空集等于A成立吗 the trip is (a?) great help这的help可数吗? All these dictionaries are ( ) to you,aren't they?A.great help B.a great help C.great helps Fast food resturant are ___to those busy people.A.great helps B.a great help C.great helpD.of a great help such a great They are such a great help to him it will be a great p__ to help you 英译中：You were a great help to us. How could a great a___like me need your help. What___ great help your advice is?A./ B.a C.an D.the 选哪一个呢?help 是可数的吗? a great a great a great a great a great A good memory is a great help in learning a laugage 等等 A good memory is a great help in learning a language.的意思?