1.Complete the sentences with a or an . if necessary.  a)    My father is 40 years old. He is ... engineer and works at Factory.

b) His mother is ... teacher of literature at school.

c) My sister is ... student and she is going to be ... economist.    .

d) Her brother will be ... artist. I don't want to be ... doctor, i want to be ... artist too.

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a)   My father is 40 years old. He is an engineer and works at a Factory.

b) His mother is a teacher of literature at school.

c) My sister is a student and she is going to be an economist.    .

d) Her brother will be an artist. I don't want to be a doctor, i want to be an artist too.

Объяснение:

Ставим a, если следующее слово начинается с согласного звука:

a factory (слово "Factory" начинается с согласного звука "f");

a  teacher (слово "Teacher" начинается с согласного звука "t");

Ставим an, если следующее слово начинается с гласного звука:

an engineer (слово "engineer" начинается с гласного звука "e");

an artist (слово "artist" начинается с гласного звука "a");