Which letter completes the following sequence? mtwtfs_

Буква "s". Это последовательность из первых букв названий дней недели. Последний день - Sunday.

Globalisation refers to the idea that the world is developing a single economy and culture as a result of improved technology and communications and the influence of very large multinational companies. They say that, as multinational corporations become more powerful, they become less accountable for their actions. globalists, argue that world trade makes everyone richer. They say that, as more countries make trade deals with one another, international understanding increases, therefore lessening conflict and improving human rights.

I am going to be a doctor. I like this profession because doctors help people to be healthy and live long. Ambulance doctors often save human lives in emergency. Medical care is very complicated profession, it requires deep knowledge of chemistry, biology, anatomy and many other sciences. Doctors effectively study and upgrade their skills all over their career. Maybe I will be a dentist, they earn lots of money. 

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I am not going to be a mechanic. I'v never seen a mechanic girl. This profession is popular rather at boys because they like to deals with nuts and bolts and dirty noisy engines full of oil. Sometimes mechanics have to move hevay stuff by hands, sometimes they undo hard tightened nuts. This kind of job is definitely not for me. Also I am afraid of welding that mechanics do sometimes, I think it is not safe.