【推荐1】Had Mr. Dewey ________ (be) present, he would have offered any possible assistance to the people there. (所给词的适当形式填空)

【推荐2】It was the first time that I __________ (be) a volunteer in MSF. (所给词的适当形式填空)

【推荐3】Worse luck! First, food and drinking water had been______before we reached the destination. Then, my husband was speeding up the car when it suddenly broke down. It turned out that the gas had______.So we had to walk ahead along the road until my strength______.We finally reached a small hotel but to our despair, we found we had______our money.(用适当的单词填空)

【推荐1】The change of management___________(boost) spirits throughout the company so far. （所给词的适当形式填空）

【推荐2】The institute spends a lot of time working on how _________ (boost) American productivity. (所给词的适当形式填空)

【推荐3】________ (boost) the economy of the suburb, the government has invited many famous companies to build factories there. (所给词的适当形式填空)