Exercise Complete the following sentences. up-down-through- round- off-into- over 1- Going... The forest was really scary. 2- Be careful or you'll fall .......... that cliff! 3- Step.......... the fallen branches. 4- Climbing....... the hill takes approximately 45 minutes. 5- Put on your life jacket, just in case you fall ........... the rapids. 6- Yesterday, a group of hikers set ........ an avalanche. 7-