This problem is said _______ three times, but he still can’t understand it.
#90815
A
to have been explaining
B
to have explained
C
having been explained
D
to have been explained
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He raised his hand ________ the taxi ________. 
#92511
A
to have, stop
B
to have, to stop
C
having , stopping
D
having , stop
We held a party on Christmas Eve at a hall _______ with colourful balloons and flowers.
#96335
A
to decorate
B
decorating
C
decorated
D
being decorated