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1. A: What were you doing (you, do) when the accident occurred?
B: I was trying (try) to change a light bulb that had burnt out.
2. Sandy is in the living room watching television. At this time yesterday, she was also watching (watch, also) television.
3. A: I called (call) you last night after dinner, but you weren't (be, not) there. Where were you?
B: I was working (work) out at the fitness center.
4. When I walked (walk) into the busy office, the secretary was talking (talk) on the phone with a custtomer, several clerks were working busily (work, busily) at their desks, and two managers were discussing (discuss, quietly) methods to improve customer service.
5. I was watching (watch) a mystery movie on TV when the electricity went out. Now I am never going to find out how the movie ands.
6. The Titanic was crossing (cross) the Atlantic when it struck (strike) an iceberg.
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We don't have to get up early at the weekend. (negative)
I have to decide which job I want before the end of the week. (positive)
We don't have to take the bus into the city center. We can walk. (negative)
She has to open the shop at 9 o`clock every morning. (positive)
You have to talk quietly in the library. (positive)
You don't have to send the letter to him by post. I will see him tomorrow and I can give it to him then. (negative)
You don't have to explain it to me. I understand the problem. (negative)
We have to stop talking when the lesson starts. (positive)
We have not to get up early at the weekend.
I have to decide which job I want before the end of the week.
We have not to take the bus into the city center. We can walk.
She has to open the shop at 9 o`clock every morning.
You have to talk quietly in the library.
You have not to send the letter to him by post. I will see him tomorrow and I can give it to him then.
You have not to explain it to me. I understand the problem.
We have to stop talking when the lesson starts.
Đáp án là: have.