单项选择题 Physics is the present-day equivalent of ______ used to be called natural philosophy, from which most of present-day science arose.

单项选择题 By the time you arrive in London, we ______ in Europe for two weeks.

单项选择题 Question 21 is based on the following news. At the end of the news item, you will be given 5 seconds to answer the question. Now, listen to the news.