Ответ:

Объяснение:

1)

a) I forgot *to lock* the door.....

b) I forgot *telling* him.....

2)

a) the teacher regretted *being* so ....

b) We regret *to inform* you.....

3)

a) I remembered *to switch off* the light.....

b) I remember "meeting" your cousin very well.

4)

a) We stopped work *to have* a break.....

b) so the scientists stopped *working* ... .

5)

a) We tried *adding* more information ....

b) she tried "to explain" the process