At the meeting the boss was explaining his plan while his secretary_________ the notes.
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A
is taking
B
was taking
C
has taken
D
takes
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My mother was cooking while I_________ the radio.
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A
listened to
B
have listened to
C
was listening to
D
am listening to
 We ___________ for a long time. Shall we play for a while?
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A
study
B
Studied
C
have studied
D
are studying