When the manager came in,the workers pretended________hard on their machines.
#92334
A
to work
B
to be working
C
to have worked
D
working
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________with so much trouble,we failed to complete the task on time.
#94214
A
Faced   
B
Face
C
Facing   
D
To face
My parents said to me , “Don’t throw waste paper about.” ---- My parents told me _________.
#93813
A
don’t throw waste paper about
B
do throw waste paper about
C
not to throw waste paper about
D
you shouldn’t throw waste paper about
 The city was difficult ________, _________ was defended by an army of 6,000 men.
#98005
A
to be taken; which
B
to take; that
C
to take; which  
D
to be taken; that
_____around the Water Cube, we were then taken to see the Bird’s Nest .
#90359
A
Having shown
B
To be shown
C
Having been shown
D
To show