He began to take political science only when he left school.
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.
What ____ fun it is to walk alone with ______ full moon hanging in the sky.