下列各句没有语病的一项是（ ）

I like Tom very much _____he sometimes gives me some trouble.– Oh, it’s unbelievable.

The house rent is expensive I’ve got about half thespace I had at home and I’m paying _______ here

Lreduce the risk of heartattacks.

Listen! Is it Linda singing in the next room –No, it __________ be her. She is still in Shanghai.