—Is there any vaccine(疫苗) against H1N1 flu that can be used on humans?
—No, but scientists are working to develop ________ .
| A．that | B．it | C．one | D．so |
______Yang Liwei succeeded in circling the earth ______ all Chinese people.
| A．What; excited | B．That; excited |
| C．What; exciting | D．That; exciting |
---Where shall we go for the holiday，to the park or to the cinema?
--- _____I don’t really mind.
| A．Forget it! |
| B．Why not? |
| C．What’s the point? |
| D．It’s up to you! |
The naughty boys hid themselves in the place_____ their parents couldn’t find them.
| A．where | B．that | C．how | D．for which |
Our school_____ the 50th anniversary of the founding of CCFLS on October 5th, 2013.
| A．detected | B．activated | C．spotted | D．celebrated |
When the telephone rang, I happened_____ a book.
| A．to be reading | B．to read | C．read | D．to have read |