【推荐1】China_______ (become) the third country to independently send astronauts into space in 2003 when Yang Liwei orbited Earth in the Shenzhou-5 spacecraft. However Shenzhou V is not designed for the environment of deep space. (所给词的适当形式填空)

【推荐2】Her ambition___________(become)an artist faded because of failing eyesight. (所给词的适当形式填空)

【推荐3】His ambition is ________ (become) an actor. (所给词的适当形式填空)

【推荐1】If someone makes a bad mistake which unintentionally harms their own interests, they are said __________ (score) an own goal. (所给词的适当形式填空)

【推荐2】Scientists claimed   __________(make) a major breakthrough in the fight against cancer in the past three months.(所给词的适当形式填空)

【推荐3】The art of cave paintings is thought ________(exist) for thousands of years.(所给词的适当形式填空)