根据首字母或中文提示提示写出句中所缺单词，注意使用正确形式
小题1:They took the children on field trips to o______________ plants and animals.
小题2:Mr Wang s_____________ his family by teaching evening classes.
小题3:His encouraging speech i______________ us to try again and never to give up.
小题4:Every morning little Peter d______________ newspapers from house to house. In this way, he can earn his school fees.
小题5: Yuan Longping had s______________ for decades to find out a way to increase rice harvests and eventually he succeeded.
小题6:Some people began to buy the new house because the price has been r_________________.
小题7:Scientists have made many important _______________ (探索，发现).
小题8:Jane Goodall tried to make the rest of the world understand and _____________ (尊重) the life of these animals.