A. Choose the correct verb from the list below to complete the following sentences. Put the verb in the negative form of the present prefect tense.
fix / begin / arrive / be I see / stop speak / buy | read / visit
yet.
him for two years.
to each other since then.
1. Mathew is waiting on the corner for his girlfriend, but she
2. My brother lives in a different country. I
3. Ellie and Bill got a divorce five years ago. They
4. It is only 8:45. The class
yet.
5. It started to snow last night and it still
6. She has finally decided which car she wants, but she
7. I heard that the movie at the Roxy Theater is great, but I
8. I bought a newspaper today, but I still
9. He took his car to the service station yesterday, but they
10.The Andersons moved out of New York ten years ago and they
to the city since then.
it yet.
it yet.
it.
it yet.
back
114
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Ответы на вопрос:
Пусть один угол х, тогда второй х+30, сумма острых углов равна 90=> 2x+30=90, тогда х=30, второй угол 60; пусть меньший катет х, тогда гипотенуза х+3, тогда х=(х+3)·sin30 , тогда х=(х+3)·1/2, 2x=x+3, x=3
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