In the following sentences, fill in the blanks with much or many :
1. It seems to me that we've had ___ assignments in English this term.
2. How ___ material can we be expected to read in one week ?
3. ____  of the books you asked us to read are not in the library.
4. I've called ___ of my colleagues over for dinner.
5. ___ of the anger you experience can be attributed to being overworked.