Jeff climbed a mountain yesterday.改为否定句

Jeff climbed a mountain yesterday.改为否定句 Bob‘s leg got hurt when ----- up mount huang我觉得应该填climbing,climbed What a surprise it is you've climbed up Mount Tai!I didn't believe I could do it__I got to the top.A unless B after C until D as I climbed a mountain是什么意思 mount Mount weekeng/climbed/a/i/last/mountain是什么意思 climb mountains的过去式是climbed a mountain还是climbed mountains By the time i——back they——up ten metres.A came.have climbed B came.had climbedC come.have climbed D had come.climbed because was mountain climbed tired i a i yesterday climbed he hill a week last能组什么句子 a mount of 与a lot of 的区别 a mount of和a number of 的区别. Mr.Smith saw the empty seat next to me and asked____.A.where has Jeff gone B.where did Jeff goC.where Jeff has been D.where Jeff had goneHelp me! Who is not here,Lily?---_____ B ____.--- __________?---- He is fine now.A.It’s Jeff; How areA.It’s Jeff; How are you,Jeff B.Jeff is at home; How about youC.Jeff is; How is he D.I’m on duty today; Is Jeff all right to mount /to board a plane哪个对? A mount of people这句话哪儿错了? a mount of 和mounts of 的关系?