$I$
$1.$ I didn't go to school yesterday because I had a bad cold
$2.$ Although Lan can sing very well, she can't play the piano.
$3.$ If we use the car all the time, we will make the air dirty
$4.$ Tea is the most popular drink in London
$II$
$1.$ Alice doesn't like doing sports very much.
$2.$ No river in the world is longer than the Nile
$3.$ How often do you practise playing table tennis?
$4.$ He might not go to the University.
$5.$ I don't like this programme because it's so boring.
`text{Chúc bạn học tốt!}`
