Tom pretended ______ it；but in fact，he knew it very well.
A．not to listen to
B．not to hear about
C．not to have heard about
D．not to be listening to
Tom pretended ______ it；but in fact，he knew it very well.
A．not to listen to
B．not to hear about
C．not to have heard about
D．not to be listening to
C
pretend not to have done假装没做过某事；pretend to be doing sth.假装正在做某事；pretend to do sth.假装做某事。由he knew it very well可知，应选C项。