Вставить артикль a или an . ...ruier,...school, ...elephant, ...aeroplane, ...computer, ...armchair, ...mouse, ...ear, ...eye, ...yellow pen, ...English book,... desk .
A ruler, a school, an elephant, an aeroplane, a computer, an armchair, a mouse, an ear, an eye, e yellow pen, an English book, a desk
a yellow pen
*an yellow pen
Надо: A yellow pen