Rewrite these sentences so that it has the same meaning as the root ones

X. Rewrite these sentences so that it has the same meaning as the root ones. 

71. My mother is shorter than my father.

My father ...................................................................................................................

72. It is not good to stay up late to listen to music.

You shouldn't...........................................................................

73. It is essential that you do your homework before going to school.

You must....................................................................................

74. Chau is the best at English in her class.

Nobody in Chau's class........................................................................

75. The hospital is behind the museum.

The museum is ...........................................................................................................

76. Thai Nguyen is smaller than Ha Noi ,and Ha Noi is maller than HCM City.

HCM   is  the…………………………………………………………………………

77. My home village lies near the foot of a mountain.

My home village…………………………………………………………………….

78.Remember to do your home work.

You must…………………………………………………………………………..

79.Lang Son is often colder than Ha Noi in winter.

Ha Noi …………………………………………………………………………….

80. It is very important for you to arrive on time.

You must…………………………………………………………………………….