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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.
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.