#Chanh
$I.$
$1.$ I think Ho Chi Minh City is more exciting than Da Nang.
$2.$ I'll think it over and give you an answer next week.
$3.$ His parents brought him up very strictly.
$4.$ He wondered whether he should tell that to her.
$II.$
$1.$ $→$ Even though it was very cold outside, we decided to go for a walk in the park.
$2.$ $→$ Mai studied hard for the exam so that she could have good marks.