—Why have you changed so much ?
—You don't know I ______ a hard life in the last ten years .
A、had
B、led
C、hadlived
D、haveled
A、whodidkickthefirstgoalintheWorldCup
B、whenwastheAPECmeetingheld
C、whenChinabecameamemberoftheWTO
D、wherewillthe2008Olympicsbeheld
Will it be_____ before the professor returns ?
A、sometimes
B、sometime
C、sometime
D、sometimes
—Whyhaveyouchangedsomuch?
—Youdon'tknowI______ahardlifeinthelasttenyears.
A、had
B、led
C、hadlived
D、haveled
Theschool_________wemetafamousscientistisnotbig.
A、which
B、onwhich
C、whose
D、where