________ some teenagers don't realize is ________ difficult life can be after they get addicted to drugs．

A．What, how

B．That, how

C．What, what a

D．That, what

The 30th Olympic Games，officially ________ as“London 2012 Olympic Games”，will take place from July 27 to August 12．

A．know

B．to know

C．known

D．knowing

The earthquake took place on ________ Friday afternoon in March and did ________ great damage to the country．

A．/,/

B．a, a

C．a,/

D．the, a

________ an important role in a new movie, Andy has a chance to become famous．

A．Offer

B．Offering

C．Offered

D．To offer

________ is no doubt that the Dallas Mavericks will defeat the Washington Wizards in the next game?

A．It

B．As

C．That

D．There

He's got himself into a dangerous situation ________ he is likely to lose control over the plane．

A．where

B．which

C．while

D．why

E-mail, as well as telephone, ________ an important part in daily communication．

A．is playing

B．have played

C．are playing

D．played

It's high time you had your hair cut; it's getting ________．

A．too much long

B．much too long

C．long too much

D．too long much

Only when the war was over ________ to his home town．

A．did the young soldier return

B．the young soldier returned

C．returned the young soldier

D．the young soldier did return

It ________ be the postman at the door．It's only six o’clock．

A．mustn't

B．can't

C．won't

D．needn't