通常使用不定冠词的短语
after a while 过了一会儿
all of a sudden 突然
as a rule 通常
as a result 结果，因此
as a matter of fact 事实上
as a whole 大体上
at a loss 不知所措
in a hurry 急忙
in a way 在某种程度上
in a word 总而言之
Its a pity that... 令人遗憾的是
put an end to... 结束
come to an end 结束
come to a conclusion 得出结论
have a good time 玩得愉快
have a rest 休息一下
have a cold 感冒
have a word with 和谈一谈
keep an eye for 对有鉴赏力
make a living 谋生
make a fire 生火
make a fool of 愚弄
take a walk 散步