John seemed puzzled about _____ the question meant.
| A．how | B．why |
| C．what | D．which |
A number of people have posted their own videos on the website You Tube, ____________their attempts to become “musicians”.
| A．to show | B．showing | C．showed | D．show |
The wild flowers looked like a soft orange blanket_____________-the desert.
| A．covering | B．covered | C．cover | D．to cover |
----Would you join us in the summer camp ?
---- , you see.
| A．It all depends | B．It doesn't matter | C．That is right | D．I'll follow you |
China won 51 gold medals in the 2008 Olympic Games, _______ first among all the competing countries.
| A．ranked | B．to rank | C．to be ranking | D．ranking |
. We are now living in an age _______ many things are done on computer.
| A．when | B．where | C．how | D．why |