Hello.<br/><br/>What are the correct sentences?<br/><br/><font color="red">- It seems silly not to tell him.</font><br/><font color="red">- There seems silly not to tell him.</font><br/><font color="red">- It appears to have been a mistake.</font><br/><font color="red">- There appears to have been a mistake.</font><br/><br/>Thanks.