问答题
After a busy day of work and play, the body needs to rest.
在繁忙的工作和玩耍了一天后，身体需要休息。
单项选择题 Some scientists think there may have been life on the Mars in the past because （）.
单项选择题 （1）处应填写（）
填空题 What should you do to protect your computer from a virus You must make sure that you have an （）.
