Are these sentences all OK?<br/><br/>a. They<i> feed <b>and</b> play with</i> their children most of the time.<br/><br/>b. They <i>play <b>with</b> and feed</i> their children most fo the time.<br/><br/>c. They <i>threaten <b>or</b> beat up</i> even their own friends.<br/><br/>d-They <i>beat up<b> or</b> threaten</i> even their own friends.