To understand the grammar of the sentence, you must break it ___________ into parts.
______ at the door before you enter my room, please.
Marry _____ as a secretary in this company for twenty years and now she stays at home taking care of her own garden.
_______ with care, one paper-bag will last for six weeks.
---Do you mind my opening the window? ----______I feel a bit cold.
--- Are you _____with doing a lot of homework everyday? --- Sometimes I am. But as a student , we have to do so at present.