男性，50岁。2年来反复发作胸骨后疼痛，发作和劳累关系不大，常在凌晨5时发作。发作时含硝酸甘油可缓解。平时心电图示Ⅰ导、aVL导联ST段水平压低0.5mm。发作时心电图正常。

本例心绞痛的冠状动脉病变最可能是哪一支受累（）

A.右冠状动脉

B.左冠状动脉主干

C.左冠状动脉回旋支

D.左冠状动脉前降支

E.右冠状动脉房室结支

根据句意及首字母提示填空。

1. Her grandparents are very kind and l_____.

2. Ann set a r_____ for the l00-meter race in the sports meeting last week.

3. We need a p_____ to help us. A man is better.

4. The kid was lost in the forest for two days. When we found him, he was still a_____.

5. She is good at singing English s_____.