— _________ I watch TV, I’ll turn it down and never make any noise.
—Good. _______ you’re doing should never disturb others. ________ how important you’re, never forget about how others feel.

____ _ he can pass the driving test is quite uncertain.

______is known to us all is that the 2008 olympic Games will take place in Beijing.
A,It     B,What    C,As    D,Which

_______was most important to her,she told me,was her family.
A,It        B,This      C,What       D,As

It is obvious to the students______they should get well prepared for their future.
A,as      b,which    C,whether      D,that

______the price of a shirt is low or not depends on the amount of material and labour involed in making it.
A,That     B,What      C,If        D,whether

_____is today Britain used to be three different countries,and over many years the three countries became one.
A,It     B,What      C,Where      D,As

______is estimated that a round-trip to Mars would take more than a year.
A,That       B,what       C,There      D,It

______leaves the room last ought to turn off the lights.
A,The person     B,whoever       C,Who      D,Anyone

_____she become an artist may have been due to her father”s influence.
A,what       B,how      C,that        D,when