—What is the population of China? —China has ____population of l.3 billion.A.the;the B.a;a C.a;the D the;a
The passenger was tired and walked slowly but he got home____.
A booking-office is a place _______ tickets are sold.
This is the reason _______ he was absent.
Listening to loud music at rock concerts ____ caused hearing loss in some teenagers.
______ the task is difficult, they managed to complete it on time.