Here are the corrected sentences:

71. It **takes** Huy three hours to do his homework every evening.
72. Viet **did not get up** early and **did** morning exercises yesterday.
73. Does Nam’s mother go **to** work by bus?
74. My father has **fewer** days off than Tim’s father.
75. Hoa prefers **reading** books to playing video games.
76. After each lesson, we often have a **ten-minute** rest.
77. Millions of foreign visitors come to Vietnam every **year** on their holiday.
78. Sorry, you can’t **speak** to Loan because she has a bath.
79. My sister **likes** playing badminton, but she doesn’t play it very **often**.
80. My brother doesn’t like durians, and I don’t like them **either**.

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