Food safety is important, so the government spares no efforts to prevent food pollution.
The teacher always waits until all the children ______ before he starts the lesson.
When I heard the news ______ our team had won the swimming competition, I couldn’t help crying.
Seeing the ______ dead cat, she was completely ______ and couldn’t say a word.
—What made Alice so upset? —________.
Oil prices have risen________32 percent since last year,________a record $84.65 a barrel on Nov.9.