'Margie thought he would not know how to put it together again.'
Whom do 'he' and 'it' refer to?Why did Margie not want 'it' to be put together again?

This question is from The Fun They Had by Isaac Asimov.

Dear student,

He refers to the country inspector and 'it' refers to Margie's mechanical teacher. Margie did not want it to be put together because it gave her tests to solve for which she had to spend long hours solving them by punching the answers and the mechanical teacher would calculate the score in no time.

Regards