He gave me some very __________ advice on buying a house.
| A．precious | B．worthy | C．precise | D．valuable |
It is the third time that she has won the race，________ has surprised us all.(2012·陕西，14)
| A．that | B．where |
| C．which | D．what |
I wish to thank Professor Smith，without________help I would never have got this far.
(2012·天津，7)
| A．who | B．whose | C．whom | D．which |
The air quality in the city，________ is shown in the report，has improved over the past two months. (2012·福建，23)
| A．that | B．it |
| C．as | D．what |
We live in an age________more information is available with greater ease than ever before. (2012·浙江，9)
| A．why | B．when |
| C．to whom | D．on which |
A lot of language learning，________has been discovered，is happening in the first year of life，so parents should talk much to their children during that period. (2012·安徽，29)
| A．as | B．it |
| C．which | D．this |