1:My ruler is in the pencil(改为一般疑问句)
ruler in the pencil-case.
2:Some alarm clocks are on the table(改为单数句)
on the table.
3:Tom's keys are in the drawer.(对in the drawer提问)
keys?
4:Can you bring your dictionary to school(做肯定回答)
5:Are ten books on the bookcase(做否定回答)