My brother is going _________ to be a doctor.
A：study medicine
B：to study medicines
C：to study medicine
D：studying medicine
把下面的词语补充完整。
____无声 ____大量 ____大悟 ____不离
食物的营养成分包括水、无机盐、维生素、糖类、蛋白质和脂肪，其中能为人体生命活动提供能量的有____、____和____。
- Are you afraid of__________ out at night?
- No, but I'm afraid __________ the strangers at night.
