Question

G. Insert prepositions: to, for, to, with, to, to, where necessary
1. a key ＿ smth
2. an approach ---- smth
3. to begin ＿ smth
4. according__ smth
5. a reason___ smth
6. to reveal ----- smth

Answer 1

1. to
2. for
3.to
4.for
5.for
6.to

Answer 2

Ответ: 1. A key to 2.an approach to 3.to begin with 4. according to 5. a reason to 6. to reveal for

Объяснение: такое можно найти без проблем в интернете самому и с помощью переводчика ;)