我要一根筷子，不是一双筷子

I want one chopstick rather than a pair.

有以下几种说法:
I want a chopstick, not a pair.(of chopsticks).
I want a chopstick rather than a pair of chopsticks.
就看你上几年级了．你自己选择一个适合你们用（你能理解的）的一种用吧！～～～

I want one piece of chopstick, not a pair.

I want a chopstick, not a pair of chopsticks.

I want a chopstick, not a pair.

我要一根筷子，不是一双筷子
I want to a chopstick ，not a pair of chopsticks