80. Whose sister is going to study in England next year?
81. How often do you stay up late on Saturday night?
82. How long has your father studied Chinese?
83. Why did she miss the early train?
84. Who does Hanh usually play with after school?
85. Why do people present rice at Tet?
86. If we don't put rubbish into the right bins, we will pollute the environment.
87. My brother is a good pianist.
88. I haven't seen Jimmy for 2 weeks.
89. This is the first time I have seen such a thrilling film.
90. Our summer vacation lasts for two months.
91. A normal TV will be less convenient than a super smart TV.