I know Mr. Shuili; we ______ to each other at an English lecture.
#102263
A
were introduced
B
are been introduced
C
are introduced
D
had been introduced
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Ladies and gentlemen, please fasten your seat belts. The plane _____.
#102445
A
takes off
B
has taken off
C
took off
D
is taking off.
As the war in Libya goes on, an increasing number of people in the country         from their homes and         a safe place to stay. 
#102629
A
have been driven; are trying to find
B
has been driven; is trying to find
C
are being driven; have found
D
have been driven; have tried to find