Помогите пожалуйста! Заполните пропуски подходящими возвратимо-усилительными

Помогите пожалуйста! Заполните пропуски подходящими возвратимо-усилительными местоимениями. 1. The student cannot solve this equation ____ we must show him how to do it. 2. must we take the measurement ___ or shall we get the figures from the table? 3. An automatic machine tool can do this work ____. В последующих предложениях определите время и залог сказуемого. предложение переведите. 1. The research into the properties of these metals IS DONE at one of moscow institutes. 2. All these metal parts ARE CUT automatically. 3. In the first year the students ARE TAUGHT many important subjects. 4. The huge automatic unit in the shop IS LOOKED AFTER by only a few men. Заблаговременно спасибо! :-)