The plan to build a new MRT station is a tiring and a demanding project. The government needs to talk to hundreds of homeowners to buy their houses to clear out the space. When the project finally kicks off they will need to block the roads everywhere during construction, causing inconvenience to millions of pedestrians and automobiles. This is going to be a tough task.
 tiring demanding toughtiring 形容很勞累的感覺，也包括心的勞累，demanding 形容很苛求的意思，用在某個工作上就有費神的感覺。
The janitor neglected his duty on the day the robbers broe into the school.