阅读理解。

     This is my shop. All students like to buy things here. Look! Here are ten pencils. They are pink and blue.

They are on sale. You can buy a pencil for only 0.4 yuan. Do you like flowers? Here are five red flowers on

the desk. One flower is one yuan. Do you see seven keys on the chair? They are black and look very nice. You

can open the pencil-boxes with them. It is two yuan. The pencil-boxes are on th desk, too. Every pencil-box is

five yuan.

1. How many pencils are there in the shop?

A. Four.

B. Six.

C. Eight.

D. Ten

2. What colour are the pencils?

A. Pink and blue.

B. Pink and red.

C. Red and black.

D. Blue and black.

3. The word"on sale"mans (意思是)_____ in Chinese?

A. 展示

B. 出售

C. 表演

D. 拍卖

4. You can open the _____ with the keys.

A. doors

B. windows

C. pencil-boxes

D. desks

5. Lily has ten yuan, and she can buy five pencils, one pencil-box, _____ key(s) and one flower.

A. one

B. two

C. three

D. four

《中华人民共和国道路运输条例》第十六条规定，客运经营者应当为旅客提供良好的乘车环境，保持车辆清洁、卫生，并采取必要的措施防止在运输过程中发生侵害旅客人身、财产安全的违法行为。这里所说的“必要措施”是指什么？