20.All ________ is a good knowledge of English.

20.All ________ is a good knowledge of English. english is a ________ to knowledge "I think good knowledge of English is ________ great help wh 『求助翻译』A good knowledge of English is necessary. have a good knowledge of TV is a good -------(mean) of getting knowledge. have (a) good knowledge of English中该不该有a? It's a must to have a good knowledge of English nowadays.(mu Only by work ing hard can you a_ a good knowledge of English They have a good knowledge of English but little()they know Our English teacher has a good ________(know) of London. Of all the students he is _____ at English.(good)