Giúp em ko cần làm câu 14 đâu ạ

`15` Because of missing the deadline , I had to pay a fine

`->` Because + V-ing/N/N phrase , S + V

`16` You don't have an official permit ; therefore ,  You cann't enter this secure area

`->` S + V ; therefore , S + V

`17` The computer malfunctioned , so we were unable to carry out the experiment

`->` S + V , so + S + V

`18` Mark wanted to improve his intonation , so he joined the English Drama Club

`->` S + V , so + S + V

`19`  Some students start to fall asleep due to the lecture being boring and irrelevant

`->` S + V + due to + N/Nphrase

`20` Several people in the crowd fainted because the heat was extreme

`->` S + V + because + S + V

$baoyen.$