I’m sorry I didn’t phone you, but I’ve been very busy ____ the past couple weeks.
—Which room would you prefer to live in, sir? —________. As long as it is clean and comfortable.
—Hey, you haven't been acting like yourself. Everything OK? —________.
Since my childhood I have found that ________ is more attractive than reading, which is my favorite.
It makes good sense to buy a large packet because ________ will work out cheaper in the end.
It is not so difficult to learn English well. ________ you need is listening, speaking, reading and writing it every day.