Without any additional training a flight attendant is not likely to advance any further. But if they wish to get additional training they can probably advance to pilot.
pressurize it
Once you are legally in the Schengen Area, you can freely travel to any other Schengen country.
doping
No you can use the white base without adding any color if you want
Without oxygen, gasoline cannot undergo combustion, which is the chemical reaction that releases energy and allows an engine to function. As a result, adding gasoline without oxygen will not produce any meaningful energy output or power.
cosmos can grow around 1-2 weeks without adding any water
You can simply end the sentence with "BC" without adding any punctuation.
Any solution, acidic or basic, can be made more dilute by adding water, thereby increasing its volume without the addition of any solute.
How can the boiling point of a liquid be raised without adding any impurity?
months and holidays were no longer in there seasons
It is not possible to provide any kind of answer without information on the relationship - if any - between the triangle and the rectangle.