I got busted for "Are those new machines?" but the translation given was "Are those machines new?" -- not "Are THE machines new?" as is shown above. The reason given for why my answer was wrong was "You used the wrong word," and the underlined ("wrong") word was... "new." So I'm really not understanding why my translation was unacceptable.
Rather "Ony jsou TO ty nové stroje?" (when you are surprised)
but the most natural is just
Jsou to ty nové stroje?