You can borrow my car ________ you promise not to drive too fast.(2012·江西，31)
A．unless B．even if
C．in case D．as long as
One's life has value ________ one brings value to the life of others.(2012·江苏，30)
A．so that B．no matter how
C．as long as D．except that
I have a tight budget for the trip，so I'm not going to fly ________ the airlines lower ticket prices.(2012·上海，32)
A．once B．if C．after D．unless
________，Carolina couldn't get the door open.
A．Try as she might B．As she might try
C．She might try as D．Might as she try
________ the jewels were locked in a strong box，the thieves stole them without any difficulty.
A．If B．Unless C．Although D．Because
________ he comes or not，the result will be the same.
A．Even if B．Whether C．No matter D．Although
