—How long have you _____the novel?—Three days.
Food safety is important. Rules____ to stop people from food pollution.
He went into his room,_____ the light and began to work.
-The doctor told me ____ too much, but I find it difficult. -The doctor is right. The less you drink. ____ you will be.
Day by day, the UN officials arediscussing about Iraq issue. But they wonder how to deal with it.
____ they are very tired, they feel happy because they’re finally finished their project.