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)