1) c. and d. because they both describe when and to what extent.
2) a. and d. because these describe to what extent and how.
3) b. because it describes to what extent
4) d. because it describes when.
5)
It means to prove someone to be truthful; to take blame away from someone.
a.we had a bath and we arrived home
b.it was lunchtime so we ate a sandwich
Answer: She was standing at the entrance in the car park
