In order to make our city green, _______. 
#98611
A
it is necessary to have planted more trees
B
many more trees need to plant
C
our city needs more trees
D
we must plant more trees
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The place is worth _________.  
#95676
A
pay a visit
B
paying a visit to
C
paying a visit
D
pay a visit to
   Finally they managed to find a path _______.
#97344
A
to follow
B
following
C
to go
D
going
In the reading room, we found her____ at a desk, with her attention____ on a book. 
#89894
A
sitting; fixing
B
to sit; fixed
C
seating; fixing
D
seated; fixed