We all got up early_____we might start at six.

The job interview is a challenge _______ the ability and talent of each interviewee is tested.

I told them not everybody could run as fast as you did, ______?

Without the contributions of Qian Xuesen, the father of Chinese missile, the achievements in space technology unthinkable in China．

Do you think John is coming to attend Mr.Lee ‘s lecture? — Sure, I have ______ him to .