When __ he __(receive) this letter?

When __ he __(receive) this letter? 1He __ __ __ /应该/stay at home2.When did the accident __ __ /发生/3Please __ __ __ /问好/to you He __ __ __ (很沮丧) when his uncle is leaving 英语翻译he __ __ __ __ __about __.he __ __ __ __about __.he __ __ __ __ about __. he askd me when he should go there(同义句)he askd me __ __ __there He __always __(ask)questions when he was young.原因.. 1.When __ he __(use)a computer?1.When __ he __(use)a computer?2.__ you ___(make) travel plans on the Internet?3.__ (not be) late for school next time. he began to be interested in music when he was 9 years old 同义句he began to be interested in music when he was 9 years oldhe began to __ music __ __ __ __ nine He __(have) a bath when the telephone ___(ring) i'll tell him the news when he __(come) He Wants you to __ him when you talk He __(have) a bath when the telephone __(ring)怎么填? He __(see)__(read)books when his mother came back. when he was 10 years old句意相同when he was 10 years__ __;when he was__five;when he was a boy__ __. He join the army when he was fifteen(保持原句意思）He join the army__ __ __ __fifteen. >__ >__ ~~~~(>__