It is never easy to adapt ________ big changesThose who can do it faster are more likely to succeed[ ]

We didn’t know you were in trouble at that time,_____we would have given you a hand.

There are two roads and either to the station.　　

David， you left your English book on the desk—It isn’t . I think it is .

下列各组词语中没有错别字的一组是( )