Has he ____(安排) for a car to pick them up from the airport?
— My cousin is good at all his subjects at school, but he never ________.
— What a ________ boy! We should learn from him.
做大小两个纸盒，尺规如下（单位：cm）
长
宽
高
小纸盒
a
b
c
大纸盒
3a
2b
2c
（1）做这两个纸盒共用料多少平方厘米？（结果用含a、b、c的代数式表示）
（2）做成的大纸盒比小纸盒的容积大多少立方厘米？（结果用含a、b、c的代数式表示）
Last night, he didn't sleep until 11 o'clock.
食物中缺乏下面哪类物质可引起夜盲症
