When I don't understand the math problem, Tom always helps me with it , he is my walking ________.When I don’t understand the math problem,Tom always helps me with it , he is my walking ________.A. director B dialogue C. dictionary D. duty

I don't know when ( ) famous When I don't sleep well? I don't know when leave 还是I don't know when to leaf I don't know when I have been loving 改错 I don’t know when will they come I don’t know when we shall start the work. When the devil angel disappears,I will don't love when you gone I was cry.But you don't I don't get your postcard.When did you ____it? 英语翻译I don't know when( )for Shanghai.(leave) when it left scars can heal~i don't know~ But I don't know when he---------(go to bed) I don't konw when we _____ startA.willB.would I couldn't underst and why they were all laughing at me.为什么laugh要加ing I don't care when you leave because you don't know cherish me 什么意思 ? I don’t know when he (arrive). When he (arrive) here, I will call you. I don't know when he ____,I must talk to him when he____.(come) I really don't know when I will start my trip=I really don't know_ _ _my trip.