ALMA observations of the continuum, ¹³CO and C¹⁸O 3−2 lines of the first three targets. Top left: zero-moment ¹³CO map. Top middle: continuum map. Top right: ¹³CO spectrum integrated over the entire disk. Bottom left: zero-moment C¹⁸O map. Bottom middle: first moment ¹³CO map (velocity map). Bottom right: C¹⁸O spectrum integrated over the entire disk. The beam is indicated in each map by a white ellipse in the lower left corner. The dotted white ellipse indicates the dust cavity radius.