__________the teacher entering  the classroom, the boy pretended _______ the text.
#91387
A
To see ; to read
B
Seen; reading
C
Seeing; to be reading
D
Seeing; to have read
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Every minute is made full _______ of _______ our lessons well.
#89931
A
to use; study
B
use; studying
C
use; to study
D
used; studying
 ____ by high mountains, the city is infamous for air pollution. 
#90478
A
Surrounding
B
To be surrounded
C
Surrounded
D
Having surrounded