Their efforts to improve the production have been very _____

Their efforts to improve the production have been very _____ His efforts to improve the sales of this product have been v _____ the parents _____ their daughter have been to Australi Many people who have been to the park _____（返回）with their fr There have been efforts in the magazine industry to buck the In recent years,great efforts have been made to increase the 英语翻译the efforts that have been made to explain optical pheno The student try very hard to improve their study改成同意句 Major efforts have been made to promote technological entrep I'm sorry dear,I have been working very hard to do their own Greater efforts to increase agricultural production must be Great efforts to increase grain production ____ if food shor