Hi, <br/><br/><br/><br/>Which one of the following sentences is better?<br/><br/><br/><br/>1a. <u>Age</u> 8-9 is a good time to introduce it to elementary students. <br/><br/><br/><br/>1b. <u>Ages</u> 8-9 is a good time to introduce it to elementary students. <br/><br/><br/><br/>2. People with their <u>age</u> above 45, please step out of the line. <br/><br/><br/><br/><br/><br/>Thanks,<br/><br/><br/><br/>MG.