it's helpful with friends该填哪个 A to studying B studying C to study D study

it's helpful with friends该填哪个 A to studying B studying C to study D study 为什么“It's helpful of you to help me clean the classroom”为什么要用helpful? we find reading english stories helpful改为同义句it's helpful us?english It’s very helpful me to read English magaznes It's helpful ____(read) in the morning It is helpful to it s helpful to read in the morning 改为同义句_ _ in the morning _ helpful it's with your it's okey with cherish with it's 1.It's hard but helpful to learn a foreign根据句意写出单词的正确形式.1.It's hard but helpful to learn a foreign Don'give up learning English it's helpful to you（同义句）Don't ___ ____ Eenglish,it's helpful to you. no card came with it Calls to the flower-shop were not helpful at all. 同义句改写:It's helpful for you to use some good ways to memorize things. It's helpful to put the _____[burn]area under cold running water Your answers,which diffier from other's ,are really outstanding.It is really helpful for me Don't give up learning english ,it’s helpful to you同意句转换 Because it's helpful for me这个句子的问句是什么