Помогите!!!!!!!!!!!!! Choose the correct word or phrase to complete each sentence. 1 I am not very fond to do / of doing tests. 2 Jessica has really looking forward to go / to going back to school. 3 my dad helped me with / for this composition. 4 Pedro has not very good at / in learning new vocabulary. 5 All the students are able of writing / to write letters to their pen friends. 6 Are you beginning to understand / understending the difference between past simple and past continuous?

Вот правильные варианты с короткими пояснениями — даю сразу исправленные предложения целиком:

1. I am not very fond of doing tests.
   После be fond of используем предлог of и герундий (doing).

2. Jessica has really been looking forward to going back to school.
   После look forward to идёт to + V-ing. Здесь ещё нужна форма been (Present Perfect Continuous): has been looking forward.

3. My dad helped me with this composition.
   После help используем предлог with для указания предмета помощи.

4. Pedro is not very good at learning new vocabulary.
   После be good/bad at используем at и герундий (learning). Также нужно is, а не has.

5. All the students are able to write letters to their pen friends.
   После be able идёт инфинитив to + V.

6. Are you beginning to understand the difference between past simple and past continuous?
   После begin/start обычно используем инфинитив to + V (в разговорной речи возможен и герундий, но здесь — инфинитив).