______ has helped to save the drowning girl is worth praising.
| A．Who | B．The one | C．Anyone | D．whoever |
The passenger was tired and walked slowly but he got home____.
| A．after all | B．in all | C．above all | D．at all |
A booking-office is a place _______ tickets are sold.
| A．when | B．where | C．why | D．which |
This is the reason _______ he was absent.
| A．that | B．which | C．why | D．what |
Listening to loud music at rock concerts ____ caused hearing loss in some teenagers.
| A．is | B．are | C．has | D．have |
______ the task is difficult, they managed to complete it on time.
| A．Because | B．Therefore | C．As | D．Though |