单选题：回答题A．呕吐酸腐B．呕吐清水痰涎C．呕吐吞酸，嗳气频繁D．呕吐反复发作，饥而不欲食E．突然呕吐，发热恶寒饮食停滞之呕吐

热证时常见

气降不及，称为

The beautiful white house_________by the Smiths．A．built B．was built C．were built

What do we know from the conversation?A．It often Snows B．It won’t snow tomorrow

What do we know about the man?A．He is a good student． B．He agrees with the woman