Вставьте на место пропуска необходимую форму герундия:
- After … (graduate) from the university he worked in the Far North.
- He remembered … (add) some water to the mixture.
- At the meeting they discussed different ways of … (improve) their work.
- There are different ways of … (obtain) the substance.
- What is the reason of his … (leave) the city so suddenly?