43. We are going to mend the roof on our house.

44. Have you been shown the house plans?

45. If Sally was absent from school on Friday, she doesn't know what she has to do for homework.

46. Yesterday I had one of my teeth taken out by the dentist.

47. All the computers have been stolen from their office.

48. The tickets haven't been paid for, have they?

49. Had I not examined the photograph myself, I would have thought it was a fake.

50. If Carol had been studying, she wouldn't have answered the phone.

43. We are going to mend the roof on our house.

44. Have you been shown the house plans?

45. If Sally was absent from school on Friday, she doesn't know what she has to do for homework.

46. Yesterday I had one of my teeth taken out by the dentist.

47. All the computers have been stolen from their office.

48. The tickets haven't been paid for, have they?

49. Had I not examined the photograph myself, I would have thought it was a fake.

50. If Carol had been studying, she wouldn't have answered the phone.

43. We are going to mend the roof on our house.

44. Have you been shown the house plans?

45. If Sally was absent from school on Friday, she doesn't know what she has to do for homework.

46. Yesterday I had one of my teeth taken out by the dentist.

47. All the computers have been stolen from their office.

48. The tickets haven't been paid for, have they?

49. Had I not examined the photograph myself, I would have thought it was a fake.

50. If Carol had been studying, she wouldn't have answered the phone.