We have discussed the project for two hours. And after a short break, the discussion .

下列各组词语中没有错别字的一项是（ ）

______ takes my mother two hours _______ housework every day.

I think you should complain, , of course, you are happy with the situation.

There are altogether fifty-four students in our class, _____ is a new comer from a faraway mountain village.