Hello, <br/><br/>Could you tell me which sentence is correct? Thank you. <br/><br/>(A) Music plays a big role in our <b>life.</b><br/><br/>(B) Music plays a big role in our <b>lives</b>. <br/><br/>Lives is a plural for life. <br/><br/>(A) I lie <b>in</b> the couch. <br/><br/>(B) I lie <b>on</b> the couch.