$\text{2.}$ Although Lan can't play the piano, she can sing very well.

$\text{3.}$ If we use cars all the time, we will make the air dirty.

$\text{4.}$ Many people enjoyed the film although the story was silly.

$\text{5.}$ Many people went to see that film. However, the ticket price was high.

$\text{8.}$ The film was so boring Jack saw it from beginning to end.ư

$\text{9.}$ Although the film have a happy ending, it begins with a terrible disaster.

$\text{10.}$ No river in the world is longer than Nile river.

$\text{11.}$ We might visit Japan in the future.

$\text{12.}$ My brother is a fast runner.

$\text{13.}$ Nga's favourite sport is badminton.

$\text{14.}$Don't swim in that polluted lake.

$\text{15.}$ No river in the world is longer than the Nile.

$\text{16.}$ They live far from the school, but we live near it.

$\text{17.}$ That is his racket over there, but this one is mine.

$\text{18.}$ Minh hopes that he will speak English well in 3 years. 

$\text{18.}$ Unless we try to save our sources of energy, they will soon end.

$\text{19.}$ Mike doesn't play chess as well as Barbare.

$\text{#YuriChan2k10}$