Question

1 we (know ) each other for many years .
2 he (be) a teacher since 1994.​

Answer 1

Explanation:

A drug is any substance (with the exception of food and water) which, when taken into the body, alters the body's function either physically and/or psychologically. Drugs may be legal (e.g. alcohol, caffeine and tobacco) or illegal (e.g. cannabis, ecstasy, cocaine and heroin).

Answer 2

Answer:

1. We know each other for many years.
2. He is a teacher since 1994.