I don’t know when he ____. But if he ____, I’ll ring you up.

I don't know when he ____,but when he ____,I will let you kn I don't know if he ___(come) tomorrow.If he ____(come),I'll I don't know when he ____ back tomorrow.Don't worry,I 'll ca I don't know when Mr.Li ____ back.But I'll call you at once I don't know when he ____,when he ______,i will tell you I don't know if he ____(be) free tomorrow. I don't know if he ____ ( come ) Choice 1.I don’t know when he ___,but when he ___,I’ll speak 46.I don't know when he ____a__,but when he ______,I'll let I don't know if he ( ) If he ( ) .I'll let you know I don’t know when he _________ tomorrow.If he _________,I’ll I don't know if he ___.if he ____,please tell me .(come)