A. command B. beard C. push in D. last A. shout B. ecology C. now D. teenager A. twenty-one B. patronage C. grass D. whether A. rational B. hide-and-seek C. trust D. dark A. mix B. in no time C. learn D. sofa A. wash B. inspection C. room D. rot A. restore B. expedition C. mobile phone D. dangerous A. go to school B. independent C. kitchen D. honestly A. scale B. windy C. hide D. clean A. baby B. care C. bird flu D. plum