Сделайте А: because
Б: so
В: but

3. go and buy something to drink.
А: Let's
Б: Could
В: Let's not

4. How about an email to Jane?
А: write
Б: written
В: writing

It was a nice day yesterday (Б) so I decided to walk to school.

3. А: Let's

4. В: writing

1. It was a nice day yesterday so I decided to walk to school.

А: because

Б: so

В: but

3. Let's go and buy something to drink.

А: Let's

Б: Could

В: Let's not

4. How about writing an email to Jane?

А: write

Б: written

В: writing