Please solve this preposition and tenses

Dear Student,

Given below are the solutions to your questions:
Question 5(a):
    1. had given
    2. to start
    3. began
    4. had done
    5. had toiled
​​​​​    6. was looking
    7. erecting
    8. needed

Question 5(b):
    (i)  on
    (ii) across
    (iii) with
    (iv) to
    (v) by
    (vi) down
​​​​​​    (vii) up
    (viii) against

Regards