Wind power is an ancient source of energy ______we may return in the near future.(2010 ,上海)
| A．on which |
| B．by which |
| C．to which |
| D．from which |
44.It'll be the first time____________the play.
45.
| A．I've watched | B．I'll watch | C．I watch | D．I would watch |
46.It's no use___________over spilt milk.
47.
| A．cry | B．crying | C．that you cry | D．for you to cry |
48.It was great joy_________he received the news that his long lost son would return home
49.
| A．as | B．that | C．so | D．for |
44. She heard a terrible noise, ______ brought her heart into her mouth.
| A．it | B．which | C．this | D．that |
45. The teacher gave the books to all the students except _______who had already taken them.
| A．ones | B．some | C．the ones | D．the others |