Unit 7Whats the highest mountain in the world?,.根据首字母及汉语提示补全单词 1.It is very dangerous to swim in the river,because it is very deep( 深的 ). 2.In ancient( 古老的 ) times,people lived a hard life. 3.To protect( 保护 ) the environment,we should plant more trees. 4.Su Bingtian is one of those who run fastest in Asia( 亚洲 ). 5.They lost their way in the desert( 沙漠 ),but they didnt give up looking for a way out.,.根据句意用所给词的适当形式填空 1.He moved the chair two meters( meter ) to the left. 2.Miss Liu is one of the mo