--- Did you find the pen yesterday?--- No, I didn’t find ________, but I have bought ________.
#4883
A
it; it
B
one; it
C
it; one
D
one; one
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He apologized for _____.
#4530
A
his not being able to come
B
his being not able to come
C
his being able not to come
D
him not being able to come
--I don't think we have met before.--Yes, once at a party, but we___________.
#4832
A
weren't introduced
B
didn't introduce
C
haven't introduced
D
were not introducing
 Richard was called in by the police to answer questions _______ the disappearance of Thomas Ripley, whose relatives were so ______ his present situation.
#4655
A
concerning; concerned about
B
concerned; worrying about
C
with regards to; concerned
D
regarding; concerning about