20. The youngest daughter got angry again. Mother felt very _____ and father's face wore a ____ expression.

　　　A. puzzled; puzzling B. puzzling; puzzled C. puzzling; puzzling D. puzzled; puzzled

21. Police are now searching for a woman who is reported to ______ since the flood hit the area last Friday.

　　　A. having been missing B. have got lost C. be missing D. get lost

22. ______ in a friendly way, their quarrel came to an end.

　　　A. Being settled B. Settled C. Having settled D. Settling

23. When we came into the reading room, we found her _____ at a desk, with her attention ______ on a book.

　　　A. sitting; fixing B. sit; fixed C. sitting; to be fixed D. seated; fixed

DCBAD CBDDC BADCB CABAD ABD