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439.Look at the timetable. Hurry up! Flight 4026 ________ off at 18:20.
A.takes
B.took
C.will be taken
D.has taken
440.You look very tired.______ well last night?
No, not really. I'm tired out now.
A.Do you sleep
B.Were you sleeping
C.Did you sleep
D.Had you slept
