Freeguy
Senior Member
- Joined
- Oct 4, 2013
- Member Type
- English Teacher
- Native Language
- Persian
- Home Country
- Iran
- Current Location
- Iran
The basic source or calories is glucose, ...... produced by plants.
1. a sugar
2. sugar
3. is a sugar
4. which it is a sugar
In my opinion No.2 is correct. However the answer key says it must be No.1. Don't we use sugar as an uncountable noun in this sense?
1. a sugar
2. sugar
3. is a sugar
4. which it is a sugar
In my opinion No.2 is correct. However the answer key says it must be No.1. Don't we use sugar as an uncountable noun in this sense?