21. Much as Angela loves ________ beauty, she herself is not ________ beauty.
A. the; a B. the; the C. /; / D. /; a
22. Mother often encourages me that there is nothing difficult in the world that I can ________.
A．give in B．give away C．give in to D．give out
23．She has been ________ over his strange letter for several weeks, but she still figures out nothing about it.
A．puzzling B．worried C．troubled D．anxious
