.I should thank you that you should thank me.
This is the small house less than 15 square meters, under ______ roof lives a large family of three generations.
Since then the number of people taking driving lessons ________ 20%.
To understand the grammar of the sentence, you must break it ____ into parts.
The whole class________ the teacher attentively.
We don’t allow ____ in the office. But you are allowed ______ in the open air.