Here are the suggested answers for the blanks:

1. If you have an **e-book reader**, you don't have to bring all those heavy books in your bag.
2. Can I use a **correction pen** to cover errors in my writing?
3. A normal printer is more **economical** than a 3-D printer.
4. You should use this pair of **earbuds**, others won't be able to hear it.
5. A **digital camera** allows us to view and edit photos easily.
6. Don't worry. This is a **handheld**, so it's quite small and light.