Use parentheses to indicate alternative terms (as in form letters). Example: You may study any lesson(s) on our site.
Instructions: Use parentheses to indicate alternative terms in these sentences.
1. Please indicate the lecture that you want to attend.
2. I would like to know the city where your firm is located.
3. I can’t tell you my favorite book from that list.
4. Be sure to indicate the nation that you want to visit.
5. I don’t need your silly look any more today.
–For answers scroll down.
Answers:
1. Please indicate the lecture(s) that you want to attend.
2. I would like to know the city (cities) where your firm is located.
3. I can’t tell you my favorite book(s) from that list.
4. Be sure to indicate the nation(s) that you want to visit.
5. I don’t need your silly look(s) any more today.
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from Daily Grammar Lessons Blog http://dailygrammarlessons.blogspot.com/2018/06/lesson-435-mechanics-punctuation.html
James White 