Ladies and gentlemen, please fasten your seat belt. The plane __________. 
#102320
A
takes off
B
is taking off
C
has taken off
D
took off
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Over the past decades, sea ice _______ in the Arctic as a result of global warming.
#104854
A
had decreased
B
decreased
C
has been decreasing
D
is decreasing
_________ where the sound lab _________?
#103503
A
Has it decided; will built
B
Is it decided; it built
C
Has it been decided; will be built
D
Will it be decided; will be built
Frank, with his two sisters, _____London by train which _____at 8:30 next morning.
#100198
A
is leaving for; will leave
B
are leaving for; leaves
C
is leaving for; leaves
D
will leave for; will leave