By the middle of the 21st century, the vast majority of the world’s population _____ in cities rather than in the country.
#101424
A
are living
B
will be living
C
have lived
D
will have lived
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Mr. White, with his family, _______Taiwan by plane which_______ at 8:30 next morning according to the timetable. 
#99643
A
is leaving for; leaves
B
is leaving for; will leave
C
are leaving for; leaves
D
will leave for; will leave
By the time you get to Beijing tomorrow, I ______ for Shanghai.
#102526
A
am leaving
B
should have left
C
will leave
D
will have already left