By the time you get there tomorrow, they___ for Beijing.
A. will have left
B. are leaving
C. will leave e
D. are to leave
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A young man stood nearby while I (read) ______the newspaper.
There (be) _____ several such occurrences in the past few weeks.
Look, the cat (run) ____ after the mouse.
John (go) ____ to the doctor’s today because he felt ill.