Hi, <br/><br/>Please check the sentences, paying special attention to whether the prepositions are needed or not needed for the sentences.<br/><br/>1. Where are you? <br/><br/>2. Where are you <u>at</u>? -- not necessary<br/><br/>3. Whom are you talking with?<br/><br/>4. With whom are you talking?<br/><br/>5. Where are you staying?<br/><br/>6. Where are you staying <u>at</u>? -- not necessary and should be deleted<br/><br/>7. Where are you looking at?<br/><br/>8. What are you looking at?<br/><br/>9. What are you looking?<br/><br/>10. What is that you are holding on?<br/><br/>11. Whom can I pass the ball to? <br/><br/>Thank you.