77. The party lasted all night.
-> How long ..........................................................?
78. She talked to him for an hour.
-> How long ...........................................................?
79. It takes me 30 minutes to go to school.
-> How long .............................................................?
80. It takes her 32 hours to go to Ha Noi by train.
-> How long ..............................................................?
81. I am reading an English book at the moment.
-> What ......................................................................?
77. How long did the party last?
78. How long did she talk to him?
79. How long does it take you to go to school?
80. How long does it take her to go to Ha Noi by train?
81. What are you reading at the moment?
79: How long do you go to school?
80 How long do you go to Hanoi by train?
81: What are you doing at the moment?
77: How long did the party last?
78: How long did she take to him?