________ is clear is that some voluntary code of practice among scientists has to be agreed．

A．As

B．That

C．What

D．It

It was only in 1997 ________ J．K Rowling finished the first Harry Potter story, which is known as Harry Potter and the Sorcerer's Stone．

A．when

B．what

C．which

D．that

At the beginning of Jurassic Park, dinosaurs got out of control as the tropical storm ________ the power supply．

A．burned out

B．knocked out

C．left out

D．burst out

________ by the whole class for what he did wrong, Tony finally cheered up．

A．Being forgiven

B．To forgive

C．Having forgiven

D．Having been forgiven

I was blessed with a happy childhood, ________ I really enjoy myself playing with my best friend Danny．

A．which

B．whose

C．when

D．where

Wen Jiabao, ________ premier of China, told the journalists at the press conference, “________ housing price of China is far from reasonable at present．”

A．不填；不填

B．不填; The

C．the; The

D．a; A

________ on her past mistakes, Mary realised she had stayed around the wrong people．

A．To reflect

B．Reflected

C．Reflecting

D．Being reflected

My watch ________ nine o'clock．It is time for class．

A．tells

B．says

C．talks

D．speaks

________ for the boy to talk with his mouth full!

A．What bad manners it is

B．How bad manners they are

C．What bad manners it is

D．How bad manners it is

________ several times, the gift was finally accepted by my Chinese host family．

A．Turning down

B．To turn down

C．Having been turned down

D．To have been turned down．