For each sentence, click on Omit if the underlined word or words can be omitted, and click on Needed if the underlined word or words are needed for grammar or logic.
For help with this exercise, see Needed words.
Example
1 of 10
2 of 10
3 of 10
4 of 10
5 of 10
6 of 10
7 of 10
8 of 10
9 of 10
10 of 10