轻松掌握英语实用口语：单句20

I want to buy an airconditioner.

Is this washing machine automatic or semi-automatic?

This refrigerator is of low noise design.

This TV set gives sharper pictures than others.

This stereo set is a nice design.

Is this TV set on sale?

Which one is of the best quality?

Which kind is the most durable?

How long is the warranty period?