61. Did Stephenson invite the first steam engine ? 

62. I will complete the final assignment next Friday. 

63. John is going to present these reports to the executive board tomorrow. 

64. They were constituting the new shopping center at this time last year. 

65. A large storm destroyed most of this city. 

66. Have David's parents forgiven him yet? 

67. Hoa's teacher could give her a prize if she worked well. 

68. Are Lan's parents taking her to the zoo? 

69. Nam used to do his homework after dinner. 

70. I must shut all the doors before I go out. 

1. Did Stephenson invite the first steam engine ? 

2. I will complete the final assignment next Friday. 

3. John is going to present these reports to the executive board tomorrow. 

4. They were constituting the new shopping center at this time last year. 

5. A large storm destroyed most of this city. 

6. Have David's parents forgiven him yet? 

7. Hoa's teacher could give her a prize if she worked well. 

8. Are Lan's parents taking her to the zoo? 

9. Nam used to do his homework after dinner. 

10. I must shut all the doors before I go out.