1. Exercise 7

2. Edit the following paragraph twice, each time from a different point of view: At the entrance of the canyon you could see the vegetation change radically. What struck you most was the sparse, stunted growth of plants otherwise similar to those you had seen a few miles back where the river, calmer and wider, took you through a lush, open area covered with huge trees and some of the longest grasses you had ever seen.

3. Look at the following sentences and tell me which one is correct? 1. Last Saturday, I told my wife not to forget to close the window before she went to bed; but she didn't. 2. Last Saturday, I told my wife not to forget to close the window before she goes to bed; but she didn't. 3. Last Saturday, I told my wife not to forget to close the window before going to bed; but she didn't.