保證正確!
1.spent nearly,building
固定結(jié)構(gòu)：spend some time doing sth 花費(fèi)多少時(shí)間做某事
2.began
3.safety
4.Backpacking 背包旅行
5.did,start
如果對(duì)你有所幫助,請(qǐng)點(diǎn)擊我回答下面的“選為滿意回答”按鈕,what can a police dog do?(回答)what can a rescue dog do?回答)what number should we dial when there is a fire?回答)what do you think a blind man needs our healthy people to do in his life?回答)這個(gè)有難度，盡力而為吧：1. A police dog can help find criminal clues and even the criminals.2. A rescue dog can help judeg if there is anyone alive in the ruins.3. 119.4. Treating him equally to a normal man and giving some help if necessary.