填冠词.

问题描述:

填冠词.
Everything comes with ___ price ,there is no such ___ thing as a free lunch in the world.
填a.an .the ./.

a;/厉害。能说明原因吗?我如果说是语感你会不会打我= =no such thing 是固定搭配,没有冠词前面那个空不属于这种情况,一般考虑是有冠词的。用排除法,由发音知不是an,用the表特指,所以用a