Fill in the blanks with the correct option :
My friend lost his chemistry book. Now he doesn't know ________ to do and _____ to look for it.
1
what, where
2
where, what
3
which, how
4
how, when
Fill in the blanks with the correct option :
My friend lost his chemistry book. Now he doesn't know ________ to do and _____ to look for it.