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一、单项填空 1．While income worry is______rather common problem of the aged，loneliness is another problem that ______ aged parents may face. A．a；/ B．the；/ C．a；the D．the；the 解析：考查冠词的用法。第一个空用不定冠词表示泛指与后句的another相对应；parents是复数名词表示泛指，因此其前不用冠词。句意：虽然收入的担忧是老年人普遍存在的一个问题，而孤独是老年人可能面对的另一个问题。 答案：A 2．Jack came from a poor family，so his parents had to ______ a lot to pay for his education. A．accuse B．qualify C．purchase D．sacrifice 解析：考查动词词义辨析。sacrifice sth.to do “以牺牲……做某事”；accuse常与of连用，表示“控告”；purchase“购买”；qualify“使合格，使具备资格”。 答案：D 3．As is known to us all，green employees cannot develop well ______ they lack chances of practicing. A．before B．when C．while D．unless 解析：考查连词的特殊用法。when在这里表示条件，相当于if “如果”。句意：众所周知，如果没有锻炼的机会，没有经验的员工是不能有很好的发展的。 | 
