$\text{16.}$ It takes Mrs Luyen half an hour to get to work.
$\text{→}$ It takes (sb) to-V
$\text{17.}$ Is this the cheapest computer you have?
$\text{→}$ Is this là câu hỏi nên you have ko có thêm trợ V "do"
$\text{18.}$ How much does this dictionary cost?
$\text{→}$ How much + be + N = How much do/ does + N + cost?
$\text{19.}$ You don't have to finish the work today.
$\text{→}$ not important = do/ does not have to
$\text{20.}$ Tim's collection has over 800 stamps.
$\text{21.}$ What is the height of the Keangnam Landmark in Hanoi?
$\text{→}$ How high is it = What is the height of
$\text{22.}$ How heavy is your son?
$\text{→}$ What is one's weight = How heavy be sb?
$\text{23.}$ How does this face mask cost?
$\text{24.}$ What is the length of Mekong River?
$\text{→}$ How long is = What is the length of
$\text{25.}$ What is the width of the west Lake?
$\text{→}$ How wide is = What is the width of
$\text{27.}$ I didn't have a toothache and neither did they.
$\text{28.}$ Mr. Ngoc Lan had better wear gloves to pretect his hands.
$\text{→}$ had better = should
$\text{29.}$ The stomachache prevented Ms. Th. Huyen from enjoying the meal.
$\text{→}$ S + prevented sb from V-ing
$\text{30.}$ How old is your daughter, Mr. Tri?
$\text{→}$ How old is = What is one's age
$\text{31.}$ Because M. Dong was sick, he didn't go to school yesterday.
$\text{→}$ Because of + N/ V-ing = Because + S + V
$\text{32.}$ You'd better not eat too much meat.
$\text{→}$ 'd better = had better
$\text{33.}$ What is the chicken's weight?
$\text{34.}$ What's wrong with you?
$\text{→}$ What's the matter with sb = What's wrong with sb?
$\text{35.}$ Why didn't X. Mai go to class last Monday?
$\text{→}$ was absent from: vắng mặt
$\text{36.}$ Linh thought the colorful little fish was the most beautiful fish.
$\text{37.}$ D. Anh swims badly.
$\text{→}$ sau V là Adv
$\text{38.}$ Ms. Hien is a good cook.