【推荐1】They ________ (leave) for a meeting to discuss the new plan. (所给词的适当形式填空)

【推荐2】I met Professor Green in the street the other day and he told me he would soon leave ________ Britain. (用适当的词填空)

【推荐1】Water can be changed ________ steam if we heat it. （用适当的词填空）

【推荐2】These machines are of high quality and will stand up _________even the roughest wear and tear.(用适当的词填空)

【推荐3】If you’re serious about living a healthy lifestyle, it’s extremely important to surround yourself _________people who’ll provide you with the appropriate emotional support.(用适当的词填空)