I.
1.
/iz/: houses.
/s/: books, clocks, parks, streets, students, shelfs, parents.
/z/: windows, pencils, babys, schools, rulers, boys, knifes, sons, tomatos, stereos, teachers, erasers.
II.
1. How many clock are in your living room?
=> There is one clock.
2. How many student are there in your classroom?
=> There are fourty-eight.
3. How many couch are there in your house?
=> There are three.
4. How many person are there in your family?
=> There are three people.
5. How many stereo are there in your room?
=> There are one stereo.
IV.
1. What is this?
=> This is a clock.
2. What are those?
=> Those are lamps.
3. What is that?
=> That is my house.
4. What are these?
=> These are stereos.
V.
1. There is an table on the apple.
2. There aren't any clocks on the wall.
3. Are there any student in the class?
4. Are there any rivers in your country?