Ladies and gentlemen, please fasten your
题型:选择题
问题:
Ladies and gentlemen, please fasten your seat belts .The plane _____ .
A.takes off
B.is taking off
C.has taken off
D.took off
Ladies and gentlemen, please fasten your seat belts .The plane _____ .
A.takes off
B.is taking off
C.has taken off
D.took off