Oh，it’s you，Jane！I didn’t ___ you. Where have you been these years?
A.realize B.recognize C.admit D.know
(2015·北京)___________the early flight, we ordered a taxi in advance and got up very early.
A.Catching B.Caught
C.To catch D.Catch
He was about to go to bed ________ the doorbell rang.
A.while B.as C.before D.when
Video games can be a poor influence if ________ in the wrong hands.
A.to leave B.leaving C.leave D.left
No sooner _____ a paper on his latest research than he was asked to write another for the program.
A.he had finished B.he finished
C.had he finished D.he did finished
Some pre-school children go to a day care center, __________ they learn simple games and songs.
A. then B. there C. while D. where
