﹣﹣﹣I think it's difficult to write the book report in two days.I really don't know ______ .
﹣﹣﹣Plan your time properly,and you can make it.( )
why I have to do it
when will I finish it
how I can do it
if can I finish it
Aron ______ water five days later.
This is______ difficult problem that few students can work it out.
Some people plan to ______ a volunteer project to help the disabled children.
---My mother is ill in hospital. ---______
Mary ____ her mother; she has big eyes and red hair, too.