Ответ:

A: It is difficult to understand some topics which related with this grammar .( сложно понять темы связанные с этой грамматикой)

It was difficult to understand plot of the film.

B: It was really nice of you to lent me a hand in a difficult moment .

It is really nice of you to look after a child.

C: Sorry to hear that . I was surprised to hear it at this difficult moment.

Sorry to hear that. I was surprised to hear that at the last moment.

D: The first time i had failed my exam. i will do my best the next time.

The first time we have not visited the place we wanted to go most, we would probably visit it the next time.( послелний раз мы не посетили мксто в которое мы хотели больше всего попасть , мы наверняка посетим его в другой раз)

E: I am sure about my results .

We are sure to get there in time.

We have to make sure certain things.

Talking about certain things, we have to keep them in mind.

It is likely that we will get late.

It is likely that they will open next week.

It was bond to incident.

It is bond to your future .

Объяснение:

Bond to- связан с

related with- связан с

plot of the film- основная тема фильма

to lent a hand- дать руку помощи , помочь в трудную минуту

to look after a child - смотреть за ребенком

probably- наверняка, возможно , наверное

to get in time - to be in time , быть вовремя

certain things- определенные вещи , определенные темы

to keep in mind - иметь ввиду

It is likely that - вероятно что , наверняка

Good luck!)