When you speak to a group of people, do you use the plural object or the singular, for example:<br/><br/> (speaking to the class)<br/><br/>1. Teacher: Please turn on your computer(s).<br/><br/>2. Teacher: Please take out your textbook(s)<br/><br/>(the police giving an order to 3 suspects - each suspect carries a gun)<br/><br/>3. drop your weapon(s)<br/><br/>4. Flight attendant: Please store your belongings in the overhead compartment(s)<br/><br/>5. Commander: War heroes, raise your right hand(s) to ...<br/><br/>Thanks in advance!