Don’t you know that a proper amount of exercise a day will ________ to a person’s health?—No wonder so many senior citizens do exercise in the square.

请选出下列词语中加点字的读音完全正确的一项（ ）。

We had our bad times but on the whole we are ____ happy with our life

下列词语书写全都正确的一项是

下列各句中，加横线的成语使用正确的一句是（??? ）