3.
(-) Jennifer isn't busy with her homework
(?) Is Jennifer  busy with her homework?
4.
(-) We don't go to the classroom in sequence.
(?) Do we go to the classroom in sequence?
5.
(-) I don't come straight home after school.
(?) Do you come straight home after school?
6.
(-) The playground of the school isn't full of people.
(?) Is The playground of the school full of people?
7.
(-) Albert isn't her classmate in junior high.
(?) Is Albert her classmate in junior high?
8.
(-) They don't do experiments in the greenhouse.
(?) Do they do experiments in the greenhouse?
9.
(-) The teacher doesn't give the paper to all the children.
(?) Does the teacher give the paper to all the children?
10.
(-) Physics and English aren't your favourite subjects.
(?) Are Physics and English your favourite subjects?