鉴别尿崩症为肾性或中枢性，以下哪项为首选A．垂体后叶素试验B．禁水试验C．尿和血浆渗

three times a day   get to   for a week     take part in      add to

小题1:Most students _____ school very early yesterday.
小题2:In China, people usually have meals ______.
小题3:Please ____ some salt ____ the soup and it will taste better.
小题4:Mike will come to Chengdu and he will stay here _____.
小题5:She_____ the English party and talked with many new friends.