tag questions, j.diego

did you put the plate in the incubater,......

• don't you

• doesn't you

• did you

• didn't you

yesterday you put the sample in the refrigerator

• don't you

• are you

• didn't you

• aren't you

we won't have class the next friday (a)   we?

they've already finished their homework

• don't they

• do they

• won`t they

• haven't they

he didn't clean the lab,

• did he

• do he

• doesn't he

• does he

Biotechnology can be applied in various fields

• shouldn't it

• will it

• can it

• can't it

the cells can reproduces by it self

• cannot

• can't it

• cant it

• can it

you shouldn't have a headache

• should you

• shall i

• should i

• shall not

you ran a marathon

• don't you

• didn't you

• do you

• can't you

the next week we_____(-)pass the exam,_____we?

(a)