Width of shrinked questions

Dear support

I cannot find where to modify the witdth of the questions as shown in the screenshot in my form 'Machine Translation & Post-editing in the Industry'.

Could you please help me?

I see the error in your form and am able to replicate it on my end. To make the fields have equal length, toggle the setting Move to a new line found in the Properties > Advanced tab for each of the fields source language 2 and source language 3. This prevents the code of the first line of dropdowns from affecting the second or third lines.