答案：1. What's the matter with you?
解析：“你怎么了？”常用固定句型“What's the matter with you?”。
2. We must call the doctor.
解析：“我们得请医生”，“必须”用“must”，“请医生”用“call the doctor”，所以翻译为“We must call the doctor.”。
3. Open your mouth, show me your tongue. Say "Ah".
解析：“把嘴张开”用“Open your mouth”，“让我看看你的舌头”用“show me your tongue”，“说‘啊——’”用“Say "Ah"”。
4. He has a bad cold, so he must stay in bed for a week.
解析：“得了重感冒”用“have a bad cold”，“必须卧床一周”用“must stay in bed for a week”，所以翻译为“He has a bad cold, so he must stay in bed for a week.”。
5. Can you remember the doctor's telephone number?
解析：“你还能记得……吗？”用“Can you remember...?”，“医生的电话号码”用“the doctor's telephone number”，所以翻译为“Can you remember the doctor's telephone number?”。
6. Jenny has a stomach ache, so she must take some medicine.
解析：“胃痛”用“have a stomach ache”，“必须吃药”用“must take some medicine”，所以翻译为“Jenny has a stomach ache, so she must take some medicine.”。
7. That's good news for her.
解析：“对她来说，那可真是个好消息”翻译为“That's good news for her.”。