66. There aren't much students in my class.
→Many
67. My new school is more bigger than my old one.
→Bỏ
68. Nam lives at Tran Hung Dao street.
→On
69. How is Hoa unhappy?
→Why
-Because she misses her parents and friends.
70. Her date of birth is on twelve May.
→Twelfth
71. Hoa doesn’t have some friends in Hanoi.
→Any
72. We can get our books in recess.
→At
73. It takes me a day painting this house.
→To paint
74. I am never late at school.
→For
75. It’s difficult training dogs.
→To train