-While they were having dinner, the phone rang
-The train to Ha Noi will be leaving at 5 a.m tomorrow, so you have to come an hour earlier.
-The residents of the street cannot sleep because the noise from the music club is loud
-There is too much carbon dioxide (CO2) in the atmosphere causes global warming
-Plastic bags are a major source of waste, so we should not throw plastic bags everywhere.
-In spite of the hard exercise, he tries to finish it.
-If i had free time, i could go with you.
-Aids will be provided for the homeless people tomorrow by the students
Chúc bạn học tốt!!