______the doors were closed and that all the lights were off, the boy left the classroom.
#97703
A
Check
B
To check
C
Checked
D
Having checked
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_____ extremely exhausted, I turned to look at the puppy that _____ at the door.
#94642
A
Felt, lied
B
Feeling, lay
C
Fell, lied
D
To feel, lain
The city is believed      over by sandstorms from AD200 to AD400.
#91594
A
to cover
B
to be covered
C
to have been covered
D
that was covered