______ made things worse, Peter said, was that hisparents stopped supporting him in developing the “flying car”.

John’s success has nothing to do with good luck. It is years of hard work _____has made him what he is today. [ ]

(2011·辽宁，32)When the news came ________ the war broke out，he decided，to serve in the army.

We often play computers games ______ the weekend.

下列加点成语使用正确的一项是（ ）