I don't know when he ___(arrive）填什么

I don't know when he ___(arrive）填什么 I don’t know when he (arrive). When he (arrive) here, I will When did he ___?Sorry,I don't know. A`arrive in B`get to C`r Choice 1.I don’t know when he ___,but when he ___,I’ll speak .--Do you know when he ___ back --Sorry ,I don”t .When he __ I don't know when he_________.I must talk to him when he ___ I don't know when he ＿（come）back. 选择填空 ()1.I don’t know when（ ）.When he ( ) ,I’ll call you .A. I don't know when he will have the meeting 同义句 I don't know I don't know when the guest( ) be here.they( )arrive at any 1.I will tell Tom what time he should arrive.2.I don't know I don't know where he ___(go) yesterday