The Ford car left Hanoi for Nghe An and the Audi car left Nghe An for Ha Noi at the same time. The ratio of their speeds (the Ford car to the Audi car) was 4 : 3. The Ford decreased its speed by 25% and the Audi car increased its speed by 25% after they had passed each other.
When the Ford car reached Nghe An, the Audi car was still 20km away from Hanoi. The distance between Hanoi and Nghe An is ...... km

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1.The Ford car left Hanoi for Nghe An and the Audi car left Nghe An for Hanoi at the same time. The ratio of their speeds (the Ford car to the Audi car) was 4:3. The Ford car decreased its speed by 25% and the Audi car increased its speed by 25% after they had passed each other. When the Ford car reached Nghe An, the Audi car was still 20 km away from Hanoi. The distance between Hanoi and Nghe An is .... km

2.The smallest value of A= \(\frac{x-y}{x^{4}+y^{4}+6}\) is.....

1. Give the correct form of the verbs in brackets.

a, My uncle ............... (take) me to a piano concert last night. It ............... (be) nice. I really ............... (enjoy) the concert.

b, American Engineer Henry Ford ............... (start) the Ford Motor Company in 1903. Ford ............... (call) the car the Ford Model T. He............... (start) making the Ford Model T in Detroit I 1908. Millions of people ............... (buy) the car and Ford ............... (become) a very rich man.

Last Sunday was definitely not a good day for me. It all started when I got into my car and it refused to start. I immediately realised that I had left the lights on and the battery had gone flat. I telephoned my friend George and he came round and helped me start the car. I then drove into town to see a friend. I had arranged to meet him at six thirty, but by the time I got there, it was ten past seven and my friend was not there. I waited for him for an hour despite the freezing weather, but he didn’t come. When I returned to my car, I saw that someone had broken into it, probably looking for the radio. Luckily , I never leave the radio in the car ! There was nothing I could do but get into my car and drive home. Later I spoke with my friend and discovered that he had waited for only half an hour and left. He didn’t even apologise for not waiting for me longer.

1.How did the writer's unlucky day start?

....................................

2. Who helper her start the car?

......................................

3. How long was she be late for seeing her friend in town?

..............................

4. Did her friend wait for her? How long had he waited?

.................