---You should your teacher’s advice if you want to improve your science.---That sounds great.
I have to write __ letter this evening.
There __ two slices of turkey on the table and there __ some relish on the slices.
__ mix these things together.
--Can I add tomatoes __ the shopping list? --No. We have some in the fridge.
--How many hours does the boss make the workers __ a day? --About ten hours.