Ответ:
My mum is at home now.
I was at school yesterday.
I am ill now.
My father was in London last week.
Now he is at home.
I am afraid of snakes.
They are in the classroom. They are writing a dictation.
Объяснение:
last, ago, yesterday - временные маркеры Past Simple ( I, she, he, It -was/ we, they, you -were)
now, at the moment, often, usually, always - Present times (I am/ he, she, it -is/ we, they, you -are)
В последних двух нет временных маркеров, но
I am afraid of snakes (Я боюсь науков всегда, сейчас в том числе. Это факт)