mom can help us,i think. mom is busy.let's ask dad_

mom can help us,i think. mom is busy.let's ask dad_ I don't think we can do it without mom's help这句话正确吗? let's ask Mr.wu ( ) (him) can help us. bob's mom is bill is busy ,let's ask bill() jim is busy,let's ask bill() Rose is busy.Let's ask Lucy___. I can't join you because I______ help my mom I'm sorry I can't ___ you ,because I have to help my mom.A s Let's go and ask Mr Li for help.He __(possible) can give us Tom,a______the phone please,mom is busy. boy's mom is mad.