For and since

I have worked for my uncle ______ three months..

• for

• since

We have loved each other ______twenty years.

• since

• for

I have worked for my uncle _____ April.

• since

• for

We have loved each other ________1995.

• since

• for

I haven't seen her _____a month.

• For

• since

I haven´t seen her ______ February.

• for

• since

I haven't smoked a cigarette ________ I met my wife.

• since

• for

I haven´t smoked a cigarette _____ ten years.

• since

• for

She has been absent _______ Wednesday.

• since

• for

She has been absent _______two days.

• since

• for