某市场上有三种价格的香蕉，每千克分别为4、6、10元，试计算：（1）各买十元钱，平均每千克多少钱？（2）各买一千克，平均每千克多少钱？

A. He is taking an entrance examination.
B. He is working as an engineer.
C. He is receiving his Bachelor's degree.
D. He is at a job interview.

A. He suggests the woman keep trying until she gets it right.
B. He suggests the woman take a break.
C. He suggests he may be able to help her practise her lines.
D. He suggests that the woman give up if she is always having these problems.

A. To ask for help from advanced learners.
B. To receive assistance from the teacher.
C. To study by himself in the lab.
D. To join in the intermediate level.