1d.no bigger than a match box 作为后置定语修饰a mobile phone.
2c.in that case是固定搭配.意为“在那种情况下”.
3c.由题意可知,该题强调他成功获得此消息的方式,所以用how来提问
4.若题目确实如此,应该选a.要注意together为副词,原来的句子就相当于
as long as we had fun together.若题目改为as long as we were together或as long as we got together,那么就应该选d,表示伴随状态.