I must find the pen.的意思是?

I must find the pen.的意思是? Oh,I must find the ticked.为什么要用must 是I must find him.还是I must find the him . I can find the pen (in the bag).(对括号部分提问） _____ _____ you ______ the pen? the key find I must .连词成句 i want to find the very pen _____which i wrote that letter 填什么介词 为什么 I still can not find the pen I have been___for.加 looking 还是 looked? 单词填空:I must find the o____ of the cell phone.He must be worried. i find a pen on the ploor.do you know whose it is?中文意思 This is your pen,I need to find the one of my o____ 首字母填空 (just find ) my pen under the desk I still can't find the pen that I've been __ for.为什么用looking,为什么不用look. 英语小小小小小小小小题目——i can‘t find my pen——don't worry.you must put it s_______ I can`t find my pen anywhere. It __in one of your pockets. a can be b maybe c may be d must ——I can‘t find my pen.——Don’t worry.You must put it s_____ (首字母填空） I can't find my umbrella.You __________it in the office.A.must have forgotten B.must have left C.must leave D.must forget I couldn't find my pen.I l______ it I can't find my pen.May I use___(you)