As we all know, regular exercise can be _____tohealth.A．suitable B．harmful C．absent D．beneficial D【解析】试题分析：考查形容词：

Kate，could you ________ the radio a bit Your father is sleeping now.

Rod loves clocks.However, he never manages to put them together again. [ ]

The most important thing to keep in ________ mind when dealing with________ emergency is to stay calm.

Beijing expected China’s rich civilizations to________the world with a happy surprise at the opening ceremony of the 2008 Olympic Games.[ ]