"这件衬衫比那件贵。"

Translation: This shirt is more expensive than that shirt.

[michelle.ko]

"This shirt is more expensive than that one" should be accepted

[LeiFeiRalf]

Seems fixed 2018-03-22

[Max447155]

Not fixed 6-5-18

[pkoutsenko]

Here and elsewhere a good native speaker editor is needed. The app.allow for some "flexibility" too...there if often times more than one correct answer.

[christian.1042]

Yes...I reported too many times for the chinese courses

[woaikonglong]

I answered as "than that 1." Since the similar one about pants was incorrect when answered as "than that pair" and the correct answer was "than that 1". The answers are a bit inconsistent and need rounding out in the flexibility.

[LeiFeiRalf]

Just a note on English grammar... If 'one' is being used as a pronoun, you shouldn't use a numeral '1'.

[james189798]

This shirt is more expensive than that.